Fixed a bug in jsonschema.erl. Minor udpates to jsongen.erl and main.erl. Added more tests

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JSON LIBRARY UPDATES
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+List of changes:

        1) jsonschema.erl

                + Fixed a bug where 'anyOf' keyword wasn't processed properly

	2) jsongen.erl:

		+Minor updates and some cleaning up

	3) main.erl

		+ Added errors and exceptions handling.

		+ Added some verbose

	4) Renamed jsonpointer.jsch to jsonpointer1.jsch and added new file jsonpointer2.jsch