git gui 0.8.0

Open the git-gui 0.8.0 development branch.
Signed-off-by: NShawn O. Pearce <spearce@spearce.org>

GIT-VERSION-GEN

 #!/bin/sh
 
 GVF=GIT-VERSION-FILE
-DEF_VER=0.7.GITGUI
+DEF_VER=0.8.GITGUI
 
 LF='
 '