Cleanup (legacy Equinox run configuration dropped)
Cleanup (getting rid of custom path/URL converter)
Cleanup (standard error reporting in OSGi facet editor)
Cleanup (dead code)
Cleanup (enum duplicate dropped)
Cleanup (OSGi completion refactored; test added)

Bnd-specific directives excluded from completion as they don't make sense in plain manifests.
Cleanup (custom constants replaced with OSGi ones)
Cleanup (constant renamed; override with default value added)
Merge remote-tracking branch 'origin/master'