pcsx2 license: add missing nice header on various files

Remains 3 files that I don't know the source
pcsx2/windows/DwmSetup.cpp: *No copyright* UNKNOWN
pcsx2/windows/SamplProf.cpp: *No copyright* UNKNOWN
pcsx2/windows/VCprojects/IopSif.cpp: *No copyright* UNKNOWN

Remains 1 files in common that I don't know the source
common/include/comptr.h: *No copyright* UNKNOWN

Remains too much files in plugins that I don't know the source :(
pcsx2: reduce gamefix panel size

Move 2 sentences into the tooltip. Reduce both box and the useless empty space.

Unfortunately, translation would need to updated too.

Thanks Avih for the idea
codeblock: remove build file => linux is cmake only

They are completely out-dated. And nobody have time to update them.
cmake: new option -DEXTRA_PLUGINS=TRUE|FALSE

--extra for ./build.sh script

By default only build the pricipal plugin: GSdx|zzogl/spu2-x/onepad/UsbNull/Dev9Null

Extra plugins are: GsNull|zzogl-cg/Spu2Null|zerospu/PadNull

The purpose is to improve compilation time on linux