[PATCH] Add grep_shortcuts

Closes #125, Thanks David Lee!

lib/git/grep_shortcuts.sh

@@ -0,0 +1,24 @@
+git_grep_shortcuts() {
+  fail_if_not_git_repo || return 1
+  git_clear_vars
+  # Run ruby script, store output
+  tmp_grep_results="$(git rev-parse --git-dir)/tmp_grep_results_$$"
+  git grep -n --color=always "$@" |
+    /usr/bin/env ruby "$scmbDir/lib/git/grep_shortcuts.rb" >"$tmp_grep_results"
+
+  # Fetch list of files from last line of script output
+  files="$(tail -1 "$tmp_grep_results" | sed 's%@@filelist@@::%%g')"
+
+  # Export numbered env variables for each file
+  IFS="|"
+  local e=1
+  for file in ${=files}; do
+    export $git_env_char$e="$file"
+    let e++
+  done
+  IFS=$' \t\n'
+
+  # Print status
+  cat "$tmp_grep_results" | sed '$d' | less -SfRMXFi
+  rm -f "$tmp_grep_results"
+}