Got rid of all code dealing with msgpack.
Version 2.6.0 is not working as for pkg-config jansson's version is 2.6!
Got rid of msgpack in the build system.
Printing jansson library's version.
RFC 4627 for JSON.
Now the program will depend on jansson but no more on msgpack
Don't check for libraries that we do not use
Begun the work on jansson and JSON!