[rbp/omxplayer] Support ff/rew

Big missing feature added for Pi.
It works by increasing the clock and discarding audio when at 2x and 4x.
For rewind and 8x and higher, it uses a different scheme. It pauses video, and single steps.

For both schemes it uses the normal dvd player mechanism of seeking when the clock has diverged by too much.

Notes:
dvdplayer still decodes (then discards) audio when ff/rew.
I'm skipping the decode step (too much cpu at 4x realtime).

I've made GetTime return m_clock.GetClock() when ff/rew. (m_State.time is too jumpy).
renderer: drop old texture done event for gles
[lang] fixed: empty msgid entries
Merge pull request #2956 from davilla/drop-texturedone-event-for-gles

renderer: drop old texture done event for gles
[win32] - fix crashing with libnfs 1.6 by bumping to 1.6.1 (which is 1.6.0
+ a compile fix - 32bit time_t define was missing in the release target of
vs project for libnfs)
Merge pull request #2954 from jmbreuer/upstream-dvdmenu

Unpause (if applicable) when going to DVD menu
Merge pull request #2955 from popcornmix/ff_rew

[rtbp/omxplayer] Support ff/rew
[osx] - don't steal the hw volume keys. Those are controlled by osx and should always be. This reverts part of 6bb569c as we already did in the frodo branch. And now all nyxboard users say booo and go away ;)
[droid] fix path to xbmc depends in packaging Makefile
fixed crash when CLocalizeStrings::Load() is called from multiple threads, which is possible when called by add-ons.
fixed, ANativeActivity is a struct, not a class
smartplaylists: fix parsing of sort direction from JSON object
Improve stream seek/cache interaction: Incorporate current pos/ts into
offset guessing
Extend logging, make logging more readable for this UC
.gitignore: Eclipse .autotools project file
Generate stable DVD disk IDs by performing CSS first
More accurate seeking with libdvdnav
http://trac.xbmc.org/ticket/12212 applied to current codebase
full credit should go to gnosygnu, see
http://forum.videolan.org/viewtopic.php?f=32&t=76308&start=20#p316583
Script to package the current working directory revision up,
to be consumed by the OpenELEC build forked as jmbreuer/OpenELEC.tv
Add configure parameters memo