Started local database implementation

Backed by nedb
Update database structure and tvshow provider

We now extract data for tvshow from the local database.
Added "Initializing…" message when loading the database for the app
Keep migrating with the local db
Merge pull request #125 from popcorn-official/dev-database

Dev database
Sort TV Shows by rating by default
Fix TV rating stars
Merge pull request #127 from sammuel86/dev-0.3

Fix TV rating stars
Add genres to TV Shows display
Merge branch 'dev-0.3' of github.com:popcorn-official/popcorn-app into dev-0.3
Show genre of TV Show
Revert "Show genre of TV Show"

This reverts commit 271531db37439f61ba0bb35640eedbda2239f9aa.
Merge remote-tracking branch 'upstream/dev-0.3' into dev-0.3
Get rid of console log
Update Episode display - We don't need "Season #…" seeing as the season number is on the left
We dont need 5 genres on some Tv shows...
Merge pull request #128 from sammuel86/dev-0.3

Show olny 1 genre for TV shows
Initial Trailer support

Play youtube trailers using videojs-youtube.