First version of clang parser

Hi, 
the clang paser is now in a semi usable state. Together with the clang_integration branch from
https://github.com/jmachowinski/orogen it is possible to generate correct tlbs for base types.

Note that there are still some hard coded paths in 
bindings/ruby/lib/typelib/clang.rb.

Please test and review these changed.
Greetings
   Janosch


Funny, I copied the code below from somewere in typelib or orogen...

The problem with the list of names is, that they would need to go over the command line.
And passing any complex string over the command line, expecially if it COULD contain spaces
is a pain. Therefore the save/load mechanism