git-gui: Implement basic branch switching through read-tree.
-rw-r--r-- 36 .gitignore
-rwxr-xr-x 745 GIT-VERSION-GEN
-rw-r--r-- 1200 Makefile
-rw-r--r-- 1659 TODO
-rwxr-xr-x 110927 git-gui.sh