- Fixed Python pep8 issues
- Removed dead code
- Rewritten configuration management
- Rewritten Arguments/subcommands handling
- Added Args upgrade to accommodate all these changes without changing
  glusterd code
- use of md5 removed, which was used to hash the brick path for workdir

Both Master and Slave nodes will have subdir for session in the
format "<mastervol>_<primary_slave_host>_<slavevol>

  $GLUSTER_LOGDIR/geo-replication/<mastervol>_<primary_slave_host>_<slavevol>
  $GLUSTER_LOGDIR/geo-replication-slaves/<mastervol>_<primary_slave_host>_<slavevol>

Log file paths renamed since session info is available with directory
name itself.

  $LOG_DIR_MASTER/
      - gsyncd.log - Gsyncd, Worker monitor logs
      - mnt-<brick-path>.log - Aux mount logs, mounted by each worker
      - changes-<brick-path>.log - Changelog related logs(One per brick)

  $LOG_DIR_SLAVE/
      - gsyncd.log - Slave Gsyncd logs
      - mnt-<master-node>-<master-brick-path>.log - Aux mount logs,
        mounted for each connection from master-node:master-brick
      - mnt-mbr-<master-node>-<master-brick-path>.log - Same as above,
        but mountbroker setup

Fixes: #73
Change-Id: I2ec2a21e4e2a92fd92899d026e8543725276f021
Signed-off-by: Aravinda VK <avishwan@redhat.com>