added several commands

README.md

@@ -9,6 +9,9 @@ A small command-line-like Git module for Racket, implemented directly on top of
 (git 'diff)
 (git 'diff '--cached)
 (git 'add "main.rkt" "info.rkt")
+(git 'restore '--staged "scratch.rkt")
+(git 'reset 'HEAD "--" "main.rkt")
+(git 'grep '-i '-n "todo")
 (git 'commit "Implement raco support")
 (git 'tag "v0.2")
 (git 'branch-current)
@@ -90,8 +93,8 @@ operations use them automatically:
 
 ## Supported Git operations
 
-Version 0.2 supports repository discovery, init, clone, status, add, config,
-commit, branch, branch-current, switch, checkout, lightweight tags, log, remotes, fetch,
+Version 0.2 supports repository discovery, init, clone, status, diff, add, restore, reset, grep, config,
+commit, branch, branch-current, switch, checkout, merge, lightweight tags, log, remotes, fetch,
 fast-forward-only pull, push, tag push, network transfer progress, and HTTPS username/token credentials.
 
 SSH credentials, merge/rebase pull, annotated tags, and submodules are not yet