Merge pull request pywinauto#383 from vasily-v-ryabov/UIA

Final preparations for 0.6.3

Merge pull request pywinauto#320 from vasily-v-ryabov/UIA

Add MS Paint example (fix pywinauto#310).

Merge pull request pywinauto#304 from MagazinnikIvan/fix_alt_test

fix keyboard alt test failure

Minor update in setup.py.

Update README.md.

Update links to 0.5.3 in README.md.

Update readme, fix grammar in docs.

Update docs for 0.5.1.

Update readme.txt.

Updated version number to 0.4.2 and re-generated the documentation.