Add Kaleidoscope configuration

Kaleidoscope is a diff tool. Add configuration for it and a shortcut to
run it `git dkal`

git/gitconfig.symlink

@@ -74,6 +74,9 @@
     aa = !git ls-files -d | xargs git rm && git ls-files -m -o --exclude-standard | xargs git add
     # remove grep - Remove found files that are NOT under version control
     rg = "!sh -c 'git ls-files --others --exclude-standard | grep $1 | xargs rm' -"
+
+    # Kaleidoscope commands
+    dkal = difftool -y -t Kaleidoscope
 [color]
     diff = auto
     status = auto
@@ -122,3 +125,8 @@
     lineNumber = true
 [credential]
 	helper = osxkeychain
+[difftool "Kaleidoscope"]
+	cmd = ksdiff --partial-changeset --relative-path \"$MERGED\" -- \"$LOCAL\" \"$REMOTE\"
+[mergetool "Kaleidoscope"]
+	cmd = ksdiff --merge --output \"$MERGED\" --base \"$BASE\" -- \"$LOCAL\" --snapshot \"$REMOTE\" --snapshot
+	trustexitcode = true