Remove use of slingshot
Remove ws and xpcom profiles
Update tests for vbox-comm classloading
Add release script
Updated project.clj, release notes and readme for 0.3.0-alpha.4
Merge branch 'release/0.3.0-alpha.4'
Merge tag 'pallet-vmfest-0.3.0-alpha.4' into develop

pallet-vmfest-0.3.0-alpha.4
Updated version for next release cycle