Add GNU Ada support
From: http://sourceforge.net/projects/gnuada/files/Tools%20Source/R8/

and example from CSc 233
http://sandbox.mc.edu/~bennet/ada/examples/

Signed-off-by: Reza Jelveh <reza.jelveh@tuhh.de>
Merge pull request #29 from fishman/gnu_ada_support

Add GNU Ada support
TODO: Unit tests must be added, too.