Avoid putting jars into the classpath container that would not be retrieved to the file system.
More selectively fix ignoring conflicted artifacts.
Add options for makeSymLinks and overwriteMode.
Merge branch 'more_retrieve_options' into bizo

* more_retrieve_options:
  Add options for makeSymLinks and overwriteMode.
Merge branch 'avoid_conflicts' into bizo

* avoid_conflicts:
  More selectively fix ignoring conflicted artifacts.
  Avoid putting jars into the classpath container that would not be retrieved to the file system.