Merge branch 'git-wrapper-revisited'

This undoes the contentious Git wrapper changes I made earlier, and
retains just the bare minimum to equip the Portable Application with a
Git Bash and a Git CMD.

The resource editing has been taken out, i.e. there is no longer a way
to reconfigure on the command-line which terminal emulator is used by
the Git Bash.

While at it, also fix the problems with the Git wrapper when serving as
replacement for the hardlinked builtins which were pointed out by Philip
Oakley in Git for Windows issue 52.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho