Added necessary files to build xbmc in my way.

Added branch name to the make-devel log file.
Updated emacs desktop file.
Added new packages needed to build.
Build xbmc with 8 cores.
Added the helper file a new package needed to build xbmc.
Run xbmc at a higher priority

With this change the entire application is 'niced' up two levels.

You need to modify the file /etc/security/limits.conf by adding a line at the end:

    xbmc             -       nice            -15
Change installation path, session name and xbmc user directory name.

This patch changes the installation path (hardcoded) to /opt/xbmc-fm-master
adds a new session named XBMC FernetMenta Output to start the application,
in order to coexist with the packaged ad supposed stable version.

It changes the xbmc user working directory from .xbmc to .xbmc-fm-master
(Linux only), so to have a different configuration for the development
FernetMenta repository (branch master), with my patches.

Conflicts:

	xbmc/Application.cpp

Conflicts:

	xbmc/Application.cpp
Add display of current maximum bitrate in the 'CodecInfo' overlay window.

Fixed the max bit rate value reset at the end of play.
Enlarged the size of the Confluence skin codec information window to accomodate the new information.
Added a log at the end of play printing some information about codec dropped frames behavior.

Conflicts:

	xbmc/cores/dvdplayer/DVDPlayerVideo.cpp

Conflicts:

	xbmc/cores/dvdplayer/DVDPlayerVideo.cpp
Change the computing of the chapter time position from muxer playtime to the video playtime
Added indication of the version we are running in System > System info.
Added heat info and cpu usage info to the information screen in video player.

Display the info in Video OSD or in info window.
Updated the height of the upper fade area in show info.
Modified the fan speed display, to better manage the missing fan on the board (some HTPC don't have it, or don't have the speed measurement).
Added system fan speed to the CPU temperature label in system info window.
Added cpu speed info to the information screen in video player.
Fix size of display of current maximum bitrate in the 'CodecInfo' overlay window.
Revert "Change the computing of the chapter time position from muxer playtime to the video playtime"

This reverts commit 81cf1e8b85874b820694dcaadc401b77db4aa3f4.
[xbmc addons] The version check addon is disabled by default: the addons doesn't seem to function well in my OS.