Fixing merge issue
code formating
adding javadoc to CacheService
Renaming TimeStampInfo to TimeStampContent
Fixing spelling issues
Fixing javadoc issues
Making some fields as private
Few small improvments
Fixing helper method for file path validation
API changes according comments from review. Unit test updates
Updating readme, adding helper method to invalidate cache
Improvments in tests
Naming refactoring
Adding missing files
Updating readme