Fix memory leakage in python bindings

The python bindings generated by the groovy code generator contain a reference counting bug which results in a memory leak whenever a std::vector is converted to a python list.  The following member functions are affected:

* xbmcvfs.listdir
* xbmc.Player.getAvailableSubtitleStreams
* xbmc.Player.getAvailableAudioStreams
* xbmcgui.Control.getPosition
* xbmcgui.Dialog.browse
* xbmcgui.Dialog.browseMultiple

The reference counting bug occurs because PyList_Append() increments the reference count of the item, so the caller needs to call Py_DECREF() because it no longer owns the object.

This bug is especially problematic when running the Watchdog Service Addon since it may result in frequent calls to xbmcvfs.listdir, and each call can leak many kilobytes of data when listing directories containing many files.
[DVDInputStreamNavigator] allow fallback to root menu call if title menu call fails (like VLC)
[DVDInputStreamNavigator] allow to return from "endless" loop of NOPs
[win32/libnfs] - downgrade to 1.3.0 because of issues with 1.6 on windows
(not able to reproduce - not able to fix)
[omxplayer] Always enable timestamp fifo mode.

hints.ptsinvalid is only set for h264 in avi files. However it also can affect any videos with B frames in any container
(we have reports of mp4 and mkv stuttering because of invalid pts values).

To solve this we always enable the timestamp fifo mode, and the gpu treats this as an optional flag, and falls back to non-fifo timestamp
mode if the variance of that timestamp stream is better.
FIX: [touch] workaround double-click in file manager
Use NULL from cstddef

This fixes build when GIT_REV is not defined.
[addons] allow RunAddon() to run plugin and script add-ons that have a service add-on in the metadata first. fixes
[cosmetics] indenting
Speedup FileItem::IsSamePath

IsSamePath has been found to be expensive if PR 4301 is applied and
used, where a large number of updates a second may occur.

By switching IsMusicDB and IsVideoDB to use the URIUtils versions. A
simple string compare is used, rather than an expensive URL parser
to check the protocol.
changed: Improve subtitle logging
[omxplayer] Fix incorrect settings query that can cause video stutter

A change in CSettings was missed here, and results in the clock component not being configured correctly.
This doesn't apply the correct filtering to clock changes and can create video stutter
[omxplayer] Reduce rate of clock change to reduce video stutters

After analysing some files with video stutter, it was found that the filter coefficients used
for adjusting the clock were set higher than the maximum hdmi clock deviation allowed.

This means when gpu makes small clock adjustments to correct for lip-sync, the video drops frames.

With this patch the frame drops are fixed.
audio settings: check visible for ac3transcaode when changing number of channels
[osx/windowing] - add "Window Server" to the whitelist of obscuring
windows
FIX: [mediacodec] blacklist rockchip non-standard components
If available use videoInfoTags in IsSamePath

If VideoInfoTags are available, then comparing the DBId and the Type is
good enough for testing two items are the same path.

Benchmarking shows that this change reduces the time to compare 340 movies
from 10ms to <1ms.
Correctly use JAVA_HOME when generating SWIG bindings

Fix some compilation problems on windows with multiple java install or java not in path but with a correct JAVA_HOME defined
Merge pull request #4357 from koying/fixfilemgrdoubleclick

FIX: [touch] workaround double-click in file manager
Merge pull request #4352 from Memphiz/libnfsdowngradewin32

[win32/libnfs] - downgrade to 1.3.0 because of issues with 1.6 on window...