adding duplicating vanity Url check Issue #101
Issue # 101. Did the following Changes.
	Removed the vType all together. It is now firing on the change event of the vanity path field
	Updated comments and format of the VanityDuplicateCheck servlet
	Only include the vanityPath field set on the tab_basic.xml
Removed tab_basic from acs-commons/utilities/page
Created new structure to contain just the field set for unique-vanity-path
Updated VanityDuplicateCheck.java according to David's comments
Removing the erroneous check in of global.jsp
Merge branch 'feature/duplicateVanityCheck' of github.com:kaushalmall/acs-aem-commons into kaushalmall-feature/duplicateVanityCheck
code cleanup:
* Move servlet; replace JCR API with Sling API only
* Extract JS to separate file. Make available as a VType (existing method does not prevent dialog submission)
* Remove dummy component
Merge branch 'master' of github.com:Adobe-Consulting-Services/acs-aem-commons