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Pom build issues...

Bug fix from @andershedstrom relating to Chainr's handling of ContextualTransforms.

• Apache RAT integrated into the maven build to verify that each Java file has a copyright header.
• @snkinard added a command line tool for Diffy. The first step to a cli for Jolt transforms.
• Travis CI build added, automatically checks Pull requests.
• Chainr heavily refactored
  • Custom Java Transforms can now be loaded via Guice
    • New class of transform added, the ContextualTransform.
    • Can take input and context into account
    • Canonical example is generating urls, they may need to vary, "http" vs "https", on each run of the transform.
  • Guice specific code lives in a "jolt-guice" maven artifact

• Jolt Artifacts now available from Maven Central
• CardinalityTransform added by Sam
  • Useful if your source of JSON documents do not have consistent cardinality of their elements
  • Eg, the "photos" element varies between an array and map, depending on how many photos there actually are
• Lots of doc updates and prep for open sourcing

• Added Shiftr "#" wildcard
  • Enables Shiftr to transform maps into arrays (with a non-deterministic order)
• Enabled Jackson 2.x ability to have comments in JSON
  • It it nice to be able to document transforms
  • Commented unit test transforms to serve as documentation

Created "json-utils" artifact to contain Jolt code with Jackson dependencies Pulled in Cobertura for code coverage

Initial extraction of Jolt to be a standalone project