recompiled xtend files
move most references to the IDE backend via ErlangEngine
deprecate BackendCore.getBuildOrIdeBackend and IBackendManager.getIdeBackend, must be refactored
deprecate IErlangEngine.getBackend, as the users should be part of the engine
remove useless tests
use build backend instead of ide backend for compile and edoc handling
make ErlangToolkit an engine service
make ErlideImport an engine service
fix ErlTidyCleanup service
create EdocExport service
create Proclist service
small fixes
remane DebugHelper to EvalHelper
small fix in LiveExpressions
organized services in own packages
enable more warnings for java compiler
remove unnecessary else clauses
remove exception declarations that were not actually thrown
update compiler warnings
remove unnecessary "suppress warnings" annotations