Update CONTRIBUTING.md
Update README.md
Merge pull request #467 from Multy7/master

Update CONTRIBUTING.md to point  to the UserVoice portal for feature suggestions
fixed yifysubtitles link

the prev link is wrong
Merge pull request #527 from sagivo/patch-2

fixed yifysubtitles link
Merge branch 'dev-0.2.8' of github.com:ex0ns/popcorn-app into dev-0.2.8
Add download button next to watch to retrieve torrent file