Merge branch 'release/1_07_b7' into develop
MPDStatus: Handle NaN for MixRampDelay.

Old versions of MPD, or maybe Voyage MPD alone, would report a float NaN with
MixRampDelay, which is non-standard with newer versions.
QueueFragment: Fix the playlist queue filter to inverse match.

Broken by ffde4dd.
CoverManager: Check for null retriever when traversing the coverRetriever list.

Check for null retriever when traversing the coverRetriever list, this can
cause an exception when the cover cache is disabled.
AlbumCoverHandler: Don't try to scale if decoded bitmap is null.
cover: Only show exceptions when CoverManager.DEBUG is true.
Migrate MPDroid to new project structure
Migrade JMPDComm to the new project structure
Add crashlytics in a new flavour
Move versionCode to gradle and make it show the git hash and flavour
We're now Crashlytics fueled
Fix FOSS compilation
Fix travis
Fix callback wrongly called. Fixes #594

Sliding Layout inverted the slideOffeset parameter (why ?), this broke our manual call to the slide listner, leading to erratic actionbar behaviour.
Bump manifest versions
Merge branch 'release/1_07_b8'