upnp: ask if user wishes to stop playback on remote device on stop

This allow user to detach from a remote upnp player without
stopping playback.
upnp: split attach and play function in player

This avoids delay when attaching to stopped player.
upnp: reindent after previous commit
[ios] - cleanup the cursor key handling a bit in preparation for hooking it (needed for ios7) - get rid of the XBMCApplication class and use UIApplication instead again
[ios] - fix cursor keys for ios7 - we need to hook into sendEvent or handleKeyUiEvent (ios7) to get the cursor keys from now on - as ios7 doesn't call that method in derived classes anymore
[gui] Add chapter count and duration to the select bluray title dialog
CONTRIBUTING.md: minor cosmetics
AESinkPULSE: Don't deactivate devices when callback had no sink_info
Merge pull request #4042 from fritsch/pulseaudio-pr

AESinkPULSE: Fix blacklisting devices when callback was not for us
Merge pull request #4041 from stefansaraev/contributing

CONTRIBUTING.md: minor cosmetics
[Confluence] cosmetics - part of trac #14844
[Confluence] reserve more space for pagecount/numitems - fixes #14844
Merge pull request #4043 from ronie/PR3979

[gui] Add chapter count and duration to the select bluray title dialog
Merge pull request #4028 from Memphiz/iosbtcursors

[ios7] - fix cursor keys when using bt keyboard
[Confluence] also display seekbar when osd is active - fixes #14411
AESinkPULSE: Take care when using m_encodedRate when doing passthrough fallback to m_sampleRate
ActiveAE: Set m_encodedRate when doing transcoding
AESinkPULSE: Fix default device (again)
dvdplayer: fix audio codec ffmpeg, set buffer size correctly
Merge pull request #4045 from fritsch/pulseaudio-pr

AESinkPULSE: Be careful when using m_encodedRate fallback to sampleRate instead (fixes stereo upmix with pulse)