#432 Proposed solution for cross building against multiple Scala versions 

The main scala build has been modified to generate an artifact named cucumber-scala_2.10
A new sub-directory of the scala build has been created. This uses the same source files as its parent but builds a cucumber-scala_2.9.2 artifact using the Scala 2.9.2 compiler and library
To get this to work correctly the README.java and package.html files were moved into the scala source tree
The scala-calculator example was modified to use the cucumber-scala_2.10 artifact
The root pom.xml file no longer directly references Scala library dependencies as there are now different versions between the 2.10 and 2.9.2 build. (Is the a solution to this?)