Merge pull request #481 from al-the-x/multi-file-touch

Make `git-touch` behave like `touch` when passed multiple files.

bin/git-touch

@@ -1,8 +1,13 @@
 #!/usr/bin/env bash
 
-filename="$*"
+USAGE(){
+  echo "git touch <filename> [ <filename> . . .]" 1>&2
+  exit 1
+}
 
-test -z "$filename" && echo "filename required" 1>&2 && exit 1
+test $# -lt 1 && USAGE
 
-touch "$filename" \
-  && git add "$filename"
+for filename in $@; do
+  touch "$filename" \
+    && git add "$filename"
+done