Recognize .C files as C++ source
Pygments currently recognizes files ending in ('*.cpp', '*.hpp', '*.c++', '*.h++', '*.cc', '*.hh', '*.cxx', '*.hxx') as C++ source.
Please add '*.C' (capital C) and '*.H' to this list.
These are additional standard file extensions recognized by gcc as denoting C++ source. For example, see here: http://gcc.gnu.org/onlinedocs/gcc/Invoking-G_002b_002b.html