[Rev 01] RFR: Add git-sync command

[Erik Helin]

The pull request has been updated with additional changes.

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

Added commits:
 - a6219094: Flush System.out after printing sync message
 - da8403ff: Use --from and --to flags to specify remotes

Changes:
  - all: https://git.openjdk.java.net/skara/pull/153/files
  - new: https://git.openjdk.java.net/skara/pull/153/files/62268c27..a6219094

Webrevs:
 - full: https://webrevs.openjdk.java.net/skara/153/webrev.01
 - incr: https://webrevs.openjdk.java.net/skara/153/webrev.00-01

  Stats: 40 lines in 1 file changed: 26 ins; 8 del; 6 mod
  Patch: https://git.openjdk.java.net/skara/pull/153.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/153/head:pull/153

PR: https://git.openjdk.java.net/skara/pull/153