Refactor update-version, pyinst.py and related files

* Refactor update-version
* Moved pyinst, update-version and icon into devscripts
* pyinst doesn't bump version anymore
* Merge pyinst and pyinst32. Usage: `pyinst.py [32|64]`
* Add mutagen as requirement
* Remove make_win and related files

test/test_unicode_literals.py

@@ -15,8 +15,6 @@ IGNORED_FILES = [
     'setup.py',  # http://bugs.python.org/issue13943
     'conf.py',
     'buildserver.py',
-    'pyinst.py',
-    'pyinst32.py',
 ]
 
 IGNORED_DIRS = [