Added Eclipse Scala semantic and syntax coloring, via the Scala IDE plugin preferences.

Modeled largely after what Scala code in Sublmine Text 2 looked like. Tested on two separate OSX machines, with Juno and Scala IDE plugin nightly (the only version which currently works with Juno). There are two issues to note:

1. I added a pink color for Scala var variables. Typically, these should not be favored because of their mutable state. val variables are much more common and use the foreground color. I tried using one of the standard colors, but I found each lacking due to the number colors already in use.

2. The Scala IDE plugin seems to have an issue with the /instance/org.scala-ide.sdt.core/syntaxColouring.semantic.methodParam.colour preference. This should be the orange color, however the IDE highlights incorrectly leaving the user with much more orange than there should be. For the time being, I disabled this preference.

Here is a pic: https://twitter.com/rockymadden/status/244932635456065536/photo/1/large