migrating the CCA spec to Babel 0.11

For configure:

• babel_languages will now be dcxx, ucxx and not cxx.
• we must recognize version 0.11.

For generating the spec server code,

• babel -scxx becomes babel -sucxx.
• .cxx as well as .cc files must be included in target lists and suffix rules.
• The supporting library is now -lsidlstub_[u,d]cxx.
• VPATH needs to include ucxx, dcxx.

Several changes affect the template makefile for client compilation, cca-spec-babel/utils/Makefile_template.client.in.

• Babel generated include directories are named by language and the names changed:
• Cxx becomes cxx (and presently is deprecated/invalid).
• Languages are now ucxx and dcxx. Language cxx will reappear in babel 1.0.
• We must install *.hxx headers, not just .hh.
• We must compile .cxx files for the ucxx binding and .cc files for dcxx.
• We must build *stub_[u,d]cxx libraries.