get rid of txt file ending

MANIFEST.in

@@ -2,7 +2,7 @@
 # in addition to the default ones.
 
 include MANIFEST.in
-include INSTALL.txt LICENSE.txt TODO.txt
+include INSTALL LICENSE TODO
 
 # We explicitly include both pyx and c files, so that both are shipped in
 # source tarballs independently of whether "setup.py sdist" is run with

README.txt → README

@@ -5,6 +5,6 @@ suitable for calculations of Landauer transport (conductance, noise),
 dispersion relations, modes, wavefunctions, various Green functions, local
 density of states.
 
-See the file INSTALL.txt for installation instructions and LICENSE.txt for
-legal information.  Complete reference documentation and a tutorial are also
+See the file INSTALL for installation instructions and LICENSE for legal
+information.  Complete reference documentation and a tutorial are also
 available.

doc/source/index.rst

@@ -2,8 +2,8 @@
 kwant documentation
 ===================
 
-.. include:: ../../README.txt
-   :end-before: See the file INSTALL.txt
+.. include:: ../../README
+   :end-before: See the file INSTALL
 
 .. toctree::
    :maxdepth: 1

doc/source/install.rst

-.. include:: ../../INSTALL.txt
+.. include:: ../../INSTALL

doc/source/license.rst

-.. include:: ../../LICENSE.txt
+.. include:: ../../LICENSE

setup.py

@@ -43,7 +43,7 @@ class kwant_build_ext(build_ext):
             print >>sys.stderr, \
 """{0}
 The compilation of kwant has failed.  Please examine the error message
-above and consult the installation instructions in README.txt.
+above and consult the installation instructions in README.
 You might have to customize {1}.
 {0}
 Build configuration was: