streamline sbt usage from different projects

This removes all the different instances of the sbt launcher and places
it into `sbt/sbt` where all of the (Scala) projects using sbt can access
it. Additionally, all the projects use a common ivy cache which should
speed up compiling and running the tests and decreases disk space used.
PHPixie framework
added benchmark config and deployment files
removed vendor files
Merge pull request #337 from dracony/master

PHPixie framework added
Merge pull request #383 from KevinHoward/master

Extended ServiceStack with all 6 tests against MySql, PostgreSql, and Sql Server using ORMLite
Merge pull request #279 from jrudolph/one-sbt-launcher

streamline sbt usage from different projects
Undertow: "Hello, world" -> "Hello, World!"