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
[videoinfoscanner] scan the entire subtree of path passed to scanner.

- fixes new files not getting picked up when more than 1 level down.
- fixes hashing never being used when scanning a single directory.
SlingboxLib: Fix alternative CSlingbox constructor

CSlingbox::CSlingbox(const char * szAddress, unsigned int uiPort /* = 5001 */) {
  // Call default constructor
  CSlingbox();
  ...
}

"CSlingbox();" - object is created and immediately removed.
Therefore with CSlingbox(const char * szAddress, unsigned int uiPort /* = 5001 */) class members will not be initialized.
[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
[gui] adds new method GetSelectedItemPath() to CGUIViewControl
[pvr] fix: remember the wrong selected item path if you close the channel osd

If you close the channel osd on a different group than the current playing group without switching to a channel of this group, the wrong selected item path is stored in the global variable. This fix it by setting the proper selected item of the current playing group.
[pvr] use new GetSelectedItemPath() method in CGUIWindowPVRBase
[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
fix hiding component-specific logging when debug logging is enabled and hidden through advancedsettings.xml (fixes #15409)
[bluray][files] Add new BlurayFile class.
videodb: fix issues with tvshowview by integrating "GROUP BY tvshow.idShow" into the CREATE VIEW statement