Scalajs port, with rdfstore

ScalaJS projects for banana-rdf.
  
• Antonio Garrote ported [rdfstore](https://github.com/antoniogarrote/rdfstore-js) a pure JS rdf store to banana
• added banana-pome - a first pure [scala-js](http://www.scala-js.org/) banana-rdf project. A [pome banana](http://www.bananas.org/f2/dwarf-brazilian-vs-unidentified-pome-18078.html) is a small banana.
![image](https://cloud.githubusercontent.com/assets/124506/3559590/c95e1ff0-094c-11e4-9a47-5703c8ecc6ce.png)
As per [pro-musa definition](http://www.promusa.org/Pome+subgroup) the main characteristics of the fruit are that it is small and that "The fruit bunch develops at an angle while the rachis points vertically down. The fruit apex is often bottlenecked." which I think fits very well for the very first ScalaJS banana port.
• refactored projects so as to reduce duplication
• moved to scala 2.11 but with cross compilation to scala2.10


we still want to see how much we can re-use the code of both plantain and pome. The code should end up in a near future refactoring in something like plantain/pome-js . (Given that a pome is a small plantain that naming would make sense. )