Added CachingParser layer that adds a simple LRU cache for Parser
Fixed the generics
Added extra null checks to avoid NPE
First version of the Pig interface
Conflicts:
	README.markdown
Minor cleanup
Added basic unit test
Added licence info on the Pig port.
Added licence info on the Pig port.
Added licence info on the Pig port.
Merge pull request #266 from nielsbasjes/PigSupport2

Pig support (2nd attempt)