Provide more feedback to the committer

[elliotf]

While committing, the script pauses for however long your tests take to
run without any feedback. While this may be only a few seconds, it
would be nicer to know what is going on.

With this change it will first print out what it's doing, so the pause will show 'running X' while the committer is waiting:

running pre-commit checks...
running jshint:     ok
running validation: 

I also appealed to my OCD self and aligned the output so it's more scannable:

running pre-commit checks...
running jshint:     ok
running validation: ok
running tests:      ok

[nlf]

nice, I like this. thanks for the patch

[elliotf]

I'm glad you like it. Thank you for the time-saving module!