Add clean-documentation target, and add it to the overall.  Refs #482
Add clean-documentation target, and add it to the overall.  Refs #482

cawka/ndnx,cawka/ndnx,svartika/ccnx,ebollens/ccnmp,ebollens/ccnmp,svartika/ccnx,svartika/ccnx,ebollens/ccnmp,svartika/ccnx,svartika/ccnx,cawka/ndnx,cawka/ndnx,cawka/ndnx,svartika/ccnx,ebollens/ccnmp,svartika/ccnx