add download link to magnetic field tutorial

Closes #304.
27 jobs for master in 43 minutes and 36 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build Env
manual #67338
allowed to fail manual
build-env:conda
manual #67337
allowed to fail manual
build-env:debian
manual #67339
allowed to fail manual
build-env:default
manual #67336
allowed to fail manual
build-env:ubuntu
 
  Build
passed #67345
allowed to fail
build:bleeding-edge

00:08:44

passed #67341
build:debian

00:02:40

passed #67344
build:latest

00:02:31

passed #67343
build:no-extras

00:02:19

passed #67342
build:stable

00:08:02

passed #67340
build:ubuntu

00:02:30

 
  Test
failed #67356
build PDF documentation

00:00:55

failed #67355
build documentation

00:00:47

failed #67357
allowed to fail
check for broken links in doc

00:00:47

passed #67347
allowed to fail
check for dependencies installed

00:00:47

passed #67346
allowed to fail
check whitespace style

00:00:48

failed #67354
coverage:latest

00:34:51

failed #67353
allowed to fail
test:bleeding-edge

00:02:34

passed #67351
test:debian

00:02:47

failed #67352
test:latest

00:02:10

passed #67349
test:no-extras

00:01:15

passed #67348
test:stable

00:02:10

failed #67350
test:ubuntu

00:02:54

 
  Deploy
skipped #67359
allowed to fail manual
remove_coverage
skipped #67361
allowed to fail manual
remove_docs
skipped #67358
upload coverage
skipped #67362
upload dev version docs
skipped #67360
upload documentation to the test server
 
Name Stage Failure
failed
coverage:latest Test
62.54s call     kwant/physics/tests/test_gauge.py::test_phases_composite[square-3]
51.83s call kwant/physics/tests/test_gauge.py::test_minimal_cycle_basis[3-honeycomb-circle]
29.94s call kwant/physics/tests/test_gauge.py::test_phases[cubic-finite-3]
21.61s call kwant/physics/tests/test_gauge.py::test_phases[cubic-finite-2]
============= 3 failed, 438 passed, 2 warnings in 2051.89 seconds ==============
Uploading artifacts...
tests.xml: found 1 matching files
Uploading artifacts to coordinator... ok
id=67354 responseStatus=201 Created token=8GRxz2oN
ERROR: Job failed: exit code 1
failed
test:ubuntu Test
2.46s call     kwant/physics/tests/test_gauge.py::test_minimal_cycle_basis[2-honeycomb-half-ring]
1.98s call kwant/tests/test_plotter.py::test_current_interpolation
1.91s call kwant/solvers/tests/test_mumps.py::test_wavefunc_ldos_consistency
1.81s call kwant/tests/test_rmt.py::test_gaussian_distributions
============== 3 failed, 438 passed, 2 warnings in 89.34 seconds ===============
Uploading artifacts...
tests.xml: found 1 matching files
Uploading artifacts to coordinator... ok
id=67350 responseStatus=201 Created token=bUysyZa1
ERROR: Job failed: exit code 1
failed
test:bleeding-edge Test
1.93s call     kwant/physics/tests/test_gauge.py::test_minimal_cycle_basis[2-honeycomb-half-ring]
1.85s call kwant/tests/test_kpm.py::test_convergence_custom_vector_factory
1.85s call kwant/tests/test_plotter.py::test_current_interpolation
1.72s call kwant/tests/test_plotter.py::test_plot
============== 3 failed, 438 passed, 2 warnings in 81.25 seconds ===============
Uploading artifacts...
tests.xml: found 1 matching files
Uploading artifacts to coordinator... ok
id=67353 responseStatus=201 Created token=-tDJmEg4
ERROR: Job failed: exit code 1
failed
test:latest Test
2.21s call     kwant/tests/test_kpm.py::test_check_convergence_decreasing_values
2.17s call kwant/tests/test_kpm.py::test_convergence_custom_vector_factory
2.00s call kwant/tests/test_plotter.py::test_spectrum
1.80s call kwant/tests/test_rmt.py::test_gaussian_distributions
============== 3 failed, 438 passed, 2 warnings in 85.93 seconds ===============
Uploading artifacts...
tests.xml: found 1 matching files
Uploading artifacts to coordinator... ok
id=67352 responseStatus=201 Created token=u6zNHXLF
ERROR: Job failed: exit code 1
failed
build PDF documentation Test
    app.add_js_file(require_url)
AttributeError: 'Sphinx' object has no attribute 'add_js_file'
The full traceback has been saved in /tmp/sphinx-err-uh2xk0rd.log, if you want to report the issue to the developers.
Please also report this if it was a user error, so that a better error message can be provided next time.
A bug report can be filed in the tracker at <https://github.com/sphinx-doc/sphinx/issues>. Thanks!
make: *** [latex] Error 2
Makefile:33: recipe for target 'latex' failed
make: Leaving directory '/builds/kwant/kwant/doc'
ERROR: Job failed: exit code 1
failed
build documentation Test
    app.add_js_file(require_url)
AttributeError: 'Sphinx' object has no attribute 'add_js_file'
The full traceback has been saved in /tmp/sphinx-err-pxn_0zsg.log, if you want to report the issue to the developers.
Please also report this if it was a user error, so that a better error message can be provided next time.
A bug report can be filed in the tracker at <https://github.com/sphinx-doc/sphinx/issues>. Thanks!
make: *** [html] Error 2
Makefile:39: recipe for target 'html' failed
make: Leaving directory '/builds/kwant/kwant/doc'
ERROR: Job failed: exit code 1
failed
check for broken links in doc Test
    app.add_js_file(require_url)
AttributeError: 'Sphinx' object has no attribute 'add_js_file'
The full traceback has been saved in /tmp/sphinx-err-vfd51rpv.log, if you want to report the issue to the developers.
Please also report this if it was a user error, so that a better error message can be provided next time.
A bug report can be filed in the tracker at <https://github.com/sphinx-doc/sphinx/issues>. Thanks!
make: *** [linkcheck] Error 2
Makefile:39: recipe for target 'linkcheck' failed
make: Leaving directory '/builds/kwant/kwant/doc'
ERROR: Job failed: exit code 1