[build fix] package name, public includes and namespaces

- changed package name from URL to “ndn-conference-discovey” (this of
course could be anything that identifies libraries, but URL)
- added public includes in Makefile.am
- removed “using namespace” in headers (commented out)
- modified serializeName and deserializeName of ConfierenceInfo
Merge pull request #3 from peetonn/master

[build fix] package name, public includes and namespaces