Created a small c++ librdkafka produce wrapper. It will grow in the nexts commits.
	new file:   ../c++/rdkafka.h
	modified:   .gitignore
	modified:   Makefile
	new file:   rdkafka_example.cpp
	modified:   ../rdaddr.h
Make somme fixes:

Added c++ headers in the project Makefile
	modified:   Makefile

Remove some duplicated entry in examples/Makefile
	modified:   examples/Makefile

Some fixes done here.
	modified:   examples/rdkafka_example.cpp

Updated some not-C++ compilant code
	modified:   rdaddr.h

	renamed:    c++/rdkafka.h -> rdkafkacpp.h
Merge pull request #8 from eugpermar/0.7

Created a small c++ librdkafka produce wrapper.