Adding plain framework

Hi, 

thanks for providing this platform, it's far more "real" than anything else I know.

"plain" (Product Lifecycle Application Integration) is a new framework that provides functionality comparable to SAP HANA (R, TM), but for PLM applications (2d/3d data). Its core is a column-oriented in-memory database combined with a graph database. Because it is very fast providing its services via a REST api became a bottleneck that we tried to avoid by providing an http/rest engine based on a modern technology stack: Java7, Scala 2.10.2, AIO, Delimited Continuations, Iteratees and the like.

I'll add more details and links in an update soon.