Start development on vmfest 0.4.0
Update to vbox 4.3.
Adapt exception handling to VBox 4.3.
add target to gitignore
Add stuff to gitignore
update to vbox*.jar v 4.3.4
Merge branch 'feature/vbox-4.3' into develop

Conflicts:
	project.clj
Release 0.4.0-alpha.1
Merge branch 'release/0.4.0-alpha.1' into develop