Fix missing shebang after update (BrainMaestro#9)

This will also add and test the shebang on update.

Add support for Windows (BrainMaestro#8)

* Add .idea folder to ignore list

For developers who use JetBrains IntellJIDEA.

* Add missing empty line at end of file.

* Add test-git-dir to ignore list.

* Fix tests to run on windows too.

* Use findstr on windows.

* Add SHEBANG to hook files on windows.

* Test that the shebang has been added.

* Use native PHP functions in tests.

Add some color

Fix broken tests

Create hooks directory when it does not exist (BrainMaestro#5)

Fix version string in console application (BrainMaestro#4)

Remove OS specific commands

Add update command

Update readme with new features

Add git-dir option to specify .git directory