[Editor/segment] Add some verbosity options
This branch is an attempt to add x265 (HEVC) support to avidemux.

In order to accomplish this, I am working on the following tasks:
* Porting the x264 plugin and GUI to support x265 (20% done)
* Migrating avidemux to ffmpeg 1.x to 2.x for x265 support (20% done)

Note that this solution does not currently build,
as I am working to resolve some issues with VDPAU.

The avidemux_core project; however, will build and can be considered a milestone.
Removing ffmpeg 1.2.7 as it is no longer used.
Adding includes for buffer.h, frame.h, and macros.h from libavutil to
resolve a few build issues.
Fixing vdpau.h patch as it is required to build.
Fixing a build error in the vdpau header file.

The avidemux/qt4 package can now build successfully! Another milestone.
This branch is an attempt to add x265 (HEVC) support to avidemux.

In order to accomplish this, I am working on the following tasks:
* Porting the x264 plugin and GUI to support x265 (20% done)
* Migrating avidemux to ffmpeg 1.x to 2.x for x265 support (20% done)

Note that this solution does not currently build,
as I am working to resolve some issues with VDPAU.

The avidemux_core project; however, will build and can be considered a milestone.
Removing ffmpeg 1.2.7 as it is no longer used.
Adding includes for buffer.h, frame.h, and macros.h from libavutil to
resolve a few build issues.
Fixing vdpau.h patch as it is required to build.
Fixing a build error in the vdpau header file.

The avidemux/qt4 package can now build successfully! Another milestone.
Merge branch 'master' of https://github.com/KoolAidPitcher/avidemux2
Fixing x265 plugin check
Fixing potential null reference
was added during previous patch when order of operations changed.
Fixing compilation errors in the libavcodec and huffyuv encoders.

plugins_common now builds! Another milestone.
Renaming x265_encoder to x265_configuration to avoid naming collision
Fixing compilation errors in the x265 encoder
Huge settings changeset. Avidemux now compiles!
Allowing more threads in the x264 dropdown.
That is actually the exhaustive search