Enabling Maven Profile gen-scalatra
Updating the Scalatra Template for Scala 2.11

* Moved to Scala 2.11.2
* Updated the dependencies to use latest Jetty as well as Akka
* Added the SBT Dependency Graph plugin
* Build Properties now use SBT 0.13.5
* Updated the sbt executable.
Adding Echo YAML Sample
Merge branch 'feature/develop_2.0/scala_2.11' of github.com:berngp/swagger-codegen into berngp-feature/develop_2.0/scala_2.11
Merge branch 'berngp-feature/develop_2.0/scala_2.11' into develop_2.0
removed profile
fixed typo
MCA-specific extension
Make response headers available to the code generator (tryout)
"External Documentation Object" implemented (according to spec)

Depends on https://github.com/wordnik/swagger-core/pull/716
MCA-specific extension

* remember last template execution context (to generate an output based on multiple specs)
* don't swallow exceptions