Remove DiffTwo commit & Enable Prevdiff and diff for direcotry.
tree08b7ef340458c056781239a50d5566087f2336d7
-rw-r--r-- 372 .gitignore
-rw-r--r-- 391 .gitmodules
drwxr-xr-x - Languages
-rw-r--r-- 3557 build.txt
drwxr-xr-x - common
drwxr-xr-x - contrib
drwxr-xr-x - doc
drwxr-xr-x - ext
drwxr-xr-x - src