JSON LIBRARY UPDATES

+List of changes:

	1) jsongen.erl:

		+  Major refactoring
		+  Limited the size of some structures when not given any keyword size limit (like 'maxItems' or 'maxProperties' to avoid potential crashes
		+ 'additionalProperties' is NOT working since a jsonschema generator is needed. A basic implementation might be added later on

	2) jsonschema.erl: Refactoring

	3) CHECKLIST.txt: Updated