Make previous and next work on Overcast.fm

It uses sensible defaults, in line with the iOS app. Previous goes back 15 seconds, while forwards advances 30 seconds.
Merge pull request #72 from vitorgalvao/patch-1

Make previous and next work on Overcast.fm
Added Overcast.fm to the list of supported sites
removed extraneous space from music unlimeted on the readme
Merge pull request #74 from vitorgalvao/overcast-readme

Added Overcast.fm to the list of supported sites
Merge branch 'music-unlimited-space' of github.com:vitorgalvao/beardedspice into vitorgalvao-music-unlimited-space

Conflicts:
	README.md
Merge branch 'vitorgalvao-music-unlimited-space'
add strategy for Chorus local playback
Add chorus to the supported apps list in readme
fix header notes in ChorusStrategy.h
support switching xbmc/local context
Adapt Yandex Music strategy to new site design

Old site design is still supported, because you can switch to it.
make title predicate more specific
Add support for Yandex.Browser (Chromium-based)
Merge pull request #78 from markreid/master

added Chorus strategy
Merge pull request #79 from kriomant/master

Adapt Yandex Music strategy to new site design
Merge pull request #80 from kriomant/yandex-browser

Add support for Yandex.Browser (Chromium-based)
Adding support for Cocoapods 0.34.4
Merge pull request #88 from beardedspice/cocoapods

Adding support for Cocoapods 0.34.4
Made MediaStrategyRegistry threadsafe.