Ignore media content with .nomedia in parent

Currently there is no quick way to ignore certain media files, the
android ecosystem has a '.nomedia' file to exclude directories from
being scanned. Add the same functionality to XBMC.
videodb: Add column name on GROUP query otherwise sub query returns no rows
timidity: Fix "Stage 1 -> Hall 1" reverb effect type
[android][docs] add note how to install needed deps for android ndk on ubuntu 14.04 x86_64
[videodb] Fix MySQL error while cleaning tvshows
fixed: VDPAU compile warnings
[dvdplayer] Remove omx render features from dvdplayer and handle in mmalrenderer
fixed: VAAPI compile warnings
fixed: GUIEPGGRidContainer compile warning
fixed: MusicDatabase compile warning
fixed: TextureManager compile warnings
fixed: CDDB compile warning
videodb: fix issues with tvshowview by integrating "GROUP BY tvshow.idShow" into the CREATE VIEW statement
GUI.OnScreensaverDeactivated does not follow JSON-RPC API definition

The announcement of `GUI.OnScreensaverDeactivated` does not follow the
defined API - it outputs `data` as a `boolean`, not `null`.  This
behaviour was introduced in ea9f2f01 to support a special case for CEC
devices, that must choose to act based on whether this notification was
triggered on the back of a shutdown.

As the rest of the API defines `data` to be of type `null` or `object`,
I've moved this boolean to a `shuttingDown` member on the data object,
rather than changing the API to be inconsistent for a special case.
Bump json-rpc schema version
AEStreamInfo: Handle sync headers with extension blocks

Fixes passthrough of Dolby TrueHD audio with Atmos.

Behavior based on FFmpeg patch "mlpdec: support major sync headers with
optional extension blocks" by Hendrik Leppkes.
FFMPEG: Bump to version 2.4.2
[settings] - add new expert setting for enabling ios8 compatibility
security: do not accept the MD5 hash of a password
[airplay] - implement different announcements when using the ios8 compatibility mode