p2 site: don't expose headless feature and SDK (not categorized)
bump feature versions to 0.30
fix detection of installed runtimes
remove check for compiler in runtime validation
use GitHub issues as main tracker
separate erts process from otpNode proxy

let backend aggregate them, so that when something crashes not
everything goes down
gh203 - erlang runtime error when node name is empty
reorganize tests, with clean workspace and repeatability

using WorkspaceTest as base class for tests
restrict exported guava packages
small fix in ErlParser
pathVars: use project's resolver

this allows using predefined vars like PROJECT_LOC
cleanup OtpRpcFactory
removed unused OpenService.getExternalInclude
merge ModelSearcherService into ModelFindService
extract Util.asStringList
small fixes
code cleanup
fix dependencies of dialyzer.tests
updated expression templates
small fix