[FEATURE] (git): provide shell script gita

This is a legacy commit from before 2015-03-01.
It may be incomplete as well as inconsistent.
See COPYING.legacy and README.history for details.

 scr/scm/work/README | 17 +++++++++--
 scr/scm/work/gita   | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 97 insertions(+), 2 deletions(-)

SVN Path:     http://gpitrsvn.gpi.uni-karlsruhe.de/repos/TFSoftware/trunk
SVN Revision: 5674
SVN UUID:     67feda4a-a26e-11df-9d6e-31afc202ad0c