Upgraded trove-scala to Scala 2.10.3 and SBT, added Object-primitive and primitive-Object maps

Hello. trove-scala may be "abandoned" from your perspective but I found it very useful and added half-Object maps. Recently I upgraded the project that depends on trove-scala to 2.10 and needed in the process to upgrade trove-scala (and all other Scala library dependencies). The mvn build didn't work even after trying to fix the dependencies in pom.xml, but it was easy to create an SBT build.

ben