Add ProjectRun and ProjectRunList commands

Since https://github.com/ervandew/eclim/pull/177 seems to be abandoned, this is my attempt at picking up where he left off. 

`:ProjectRun` will execute the first-found launch config for the current project
`:ProjectRunList` will list all launch configs and their type for the current project

I've only used this with Android projects, but I think works very well. For other projects that run in a console inside of Eclipse, it may be possible to hook into the `ILaunch` to dump output, terminate launches, etc. Not sure if that is necessary for this PR or not.

The commands work well in both headless mode and headed.
Hmm, why was this added? `plugins/org.ecilpse.*.jar` would match `org.eclipse.debug.*.jar` as well.