The netsurf.h header should *only* contain the registration, core
initialisation and finalisation methods. Version information is best
placed in its own header.
Also remove any unneeded inclusion of this header limiting it to
solely the places the relevant API is required.
* Tested on Solaris Express: Developer Edition,
which is between Solaris 10 and 11.
* Used gcc, libmng etc packages using pkg-get and blastwave's resources.
* Had to build lemon and re2c manually.
svn path=/trunk/netsurf/; revision=3350
