#139 -- move source files according to the Java convention; add the eclipse sbt plugin
Removed the sbt eclipse plugin
Updated the project definitions such that meta projects have eclipse-friendly folder names that are distinct from the common source folder.
Reverted to the master version.
Fixed the build to prevent creating superfluous source directories (scala and/or java)
Merge remote-tracking branch 'origin/issue139' into issue139

Conflicts:
	project/build.scala
Merge branch 'master' into Open-MBEE-issue139