Merge pull request #3 from Ozone77/linux64

Linux 64 bit: added x86_64 build support (including build for Firefox 19)
Updated for Firefox 20.
Linux32 build for 1.0.3.2013-04-03
Win32 build for 1.0.3.2013-04-03 (Firefox 20)
Linux64 build for 1.0.3.2013-04-03