Add scala 2.11 test/build verification.
* Add 2.11 build configuratoin to travis ci
* Create command which runs `safe` unit tests
* Create command to test the scala 2.11 build
* Update scalacheck to 1.11.4
* Update specs2 to 2.3.11
* Fix various 2.11/deprecation removals
and other changes.
Fix eval test failure in scala 2.11 with XML not existing.
* Added the top-level interface project for communicating across scala versions within a jvm.
* Added plugin project containing analysis compiler plugin
* Added component compiler to build xsbt components against required version of Scala on the fly
* Added interface to compiler that runs in the same version of Scala
* Added frontend that compiles against a given version of Scala with or without analysis.