Added support for loading map.xml file from external location using param SLAP_MAP_XML_FILE. Added params source:questions and source:challenge to question and challenge request
Merge remote-tracking branch 'upstream/master'

Conflicts:
	slap/src/main/java/com/ntechinternational/slap/SlapRestImpl.java
Added mongodb library and basic mongodb support for token validation
Added api version in process request. Query parameter apiversion must be provided such as apiversion=1
Merge pull request #5 from pradhanta/master

Added support for loading map.xml file from external location using para...