[Rev 01] RFR: Add submodule and subrepo support

[Erik Helin]

The pull request has been updated with additional changes.

----------------

Added commits:
 - 90496423: Fix test on Windows

Changes:
  - all: https://git.openjdk.java.net/skara/pull/217/files
  - new: https://git.openjdk.java.net/skara/pull/217/files/3506616c..90496423

Webrevs:
 - full: https://webrevs.openjdk.java.net/skara/217/webrev.01
 - incr: https://webrevs.openjdk.java.net/skara/217/webrev.00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/skara/pull/217.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/217/head:pull/217

PR: https://git.openjdk.java.net/skara/pull/217