Merge pull request #2817 from Fice/dnd_getrowoffset

[RFC] Clarify behavior of GetOffset
[FIX] Allow more paths in CFileUtils::RemoteAccessAllowed

As found by @Voyager1 there's some more path that should be allowed since they are used by addons or internally.
Perhaps more are needed, and perhaps a way to differentiate UPNP / Remote JSON / Addon JSON is needed.
Merge pull request #2740 from arnova/curl_seek_log

changed: Improve/cleanup logging when seeking cached streams
Merge pull request #2827 from alcoheca/dir-cache-exists

CDirectoryCache::FileExists failing for cached directories with no parent
fix build after 7b65508685ef7a6f3c16e9b341b2b71fafaa46b2, TexturePacker converted to use TARGET_xxx
fixed android build, Android should not really be TARGET_LINUX but it is, this gets fixed later
Merge pull request #2756 from Karlson2k/no_old_msc_ver

Remove unneeded or outdated _MSC_VER macro #ifs
[rbp/omxplayer] Simplify clock handling

In OMXClock we have an almost complete copy of DVDClock, so just use DVDClock directly.

The passing through of CDVDClock functions from OMXClock is hopefully temporary,
as I think clock manipulation is better handled from OMXPlayer than audio/video players.
Merge pull request #2833 from popcornmix/simplify_clock

[rbp/omxplayer] Simplify clock handling
[rbp/buildsystem] changed set USE_TEXTUREPACKER_NATIVE_ROOT in the build environment
[rbp/omxplayer] Add plumbing for audio GetCacheTotal
[rbp/omxplayer] OMX spec says we can transition from execute to idle
[rbp/omxplayer] Workaround for audio_mixer is not required

We have similar code in command line omxplayer, and that has never had this
workaround. I've been running with it removed for some weeks with no problems.

I believe it was working around a bug elsewhere that is no longer present.
[rbp/omxplayer] Add calls for stepping and retreiving the clock adjustment
[rbp/omxplayer] Use OMXPlaySpeed for pause/resume
[rbp/omxplayer] dispmanx now handles negative rectangles correctly so adjustment not required
[Python] Adds an optional parameter "sound" to Dialog::notification to allow a silent notification
Merge pull request #2836 from popcornmix/tidyups

[rbp/omxplayer] Some code tidy ups
Fix build after #3836
Merge pull request #2841 from popcornmix/fix_tidyups

Fix build after #3836