Working on json facility.

Stubbing out test suite.
Fixing linker errors in file.
Implement JSON parser.

Also started a small test suite to test parsing/printing
of JSON files.
Merge branch 'master' into akron/v1.3.0
Added v1.1 and v1.2 directories with some stubbed out message.* files. Also updated the Message_type enum names to reflect v1.0's.