Dropped GCC3 support, added GCC4 support.
Require cdt.core 5.4.0, down from 5.4.1.
Jenkins build slaves only have 5.4.0.
Fixed a bunch of errors related to GCC4 support.
Added combo box to choose standard library: mastd, newlib or stlport.
New project version: 1.8.
WARNING: Compiler flags are reset when projects are upgraded to 1.8.
Merge pull request #44 from fredrikeldh/master

[MOSYNC-2925]