Merge pull request #81 from ysb33r/master

Trying to address #73
Merge pull request #82 from ysb33r/master

Fixes #73. Adds support for gemWorkDir to project.jrubyexec
Added 0.1.9 roadmap entries
Update changelog with released 0.1.9 changes
Update CHANGELOG.md
Preparing to start work on 0.1.10 patch release
Rolled compatibility down to JDK6