Move setting of author & committer to post-commit hook
* Exporting variable to the git subshell prevents post-commit from
triggering itself.
* --allow-empty flag allows empty commits. (The first line of defense
against empty commits already runs when the commit is first attempted)
* --no-edit flag prevents text editor from firing up to edit the
commit message ( which is where the author gets amended )
Rename pre-commit file to post-commit
Merge pull request #33 from salarkhan/post-commit

Post Commit