Create RevParseCommand.php
Add rev-parse command to git system.
tests, better argument handling, some fixes on the command
multi args test

fix tests for php 5.3

removed array short notation

fix for php 5.3
removed array short notation
integrate the RevShare command with Commit & Object

add a Repository::isBare method

add tests
Merge pull request #68 from mathroc/feature/rev-parse-command

Feature/rev parse command