Add -runprogramargs to bnd editor model

Need it to be able to specify program arguments.

Fixes bndtools issue 589:
  bnd editor: missing 'Program Arguments'

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
Merge pull request #308 from fhuberts/progargs

Add -runprogramargs to bnd editor model
Merge pull request #306 from fhuberts/master

Fix #305: update documentation of @ProviderType and @ConsumerType