Make Travis ignore `coveralls` upload errors

Change-Id: I898e030697aafc289c1cfec424fcfd60ec303ee7
Fix #466 Add RAW output plugin

Records uncompressed audio and video to an AVI container format.

Signed-off-by: Thanh Ha <thanh.ha@alumni.carleton.ca>
Fix #483 Cannot CTRL+C to quit with the new CLI

Signed-off-by: Thanh Ha <thanh.ha@alumni.carleton.ca>
Add requirements file for Windows
Update requirements.txt

- Add missing packages

- Give an upper bound for packages that use a versioning system that
  include patch numbers

- Use strict version numbers for the rest