Better Git post-commit

The current Git post-commit script on http://sismo.sensiolabs.org seems to have unnecessary backslashes. In addition the build command doesn't terminate the commit hook immediately and thus hangs the Git commit command. Using --force makes sure the tests are run even when git commit --amend has been used.
Added line break for Git post-commit description
escaped manually the shell arg (fixes #93)
merged branch fabian/patch-1 (PR #92)

This PR was merged into the master branch.

Commits
-------

1ab7ff0 Added line break for Git post-commit description
af7abe8 Better Git post-commit

Discussion
----------

Better Git post-commit

The current Git post-commit script on http://sismo.sensiolabs.org seems to have unnecessary backslashes. In addition the build command doesn't terminate the commit hook immediately and thus hangs the Git commit command. Using --force makes sure the tests are run even when git commit --amend has been used.

---------------------------------------------------------------------------

by fabian at 2013-02-14T12:03:48Z

Sure… fixed the line width. ;-)

---------------------------------------------------------------------------

by staabm at 2013-02-14T15:04:30Z

> &>/dev/null is useless since there is --quiet option

hmm I think you can never be sure how the --quiet option is implemented by a command...

---------------------------------------------------------------------------

by lyrixx at 2013-02-15T12:36:34Z

@staabm I'am using it for lot of projects. I can ensure you that  nothing is outputted on the command line.
merged branch bamarni/patch-1 (PR #94)

This PR was merged into the master branch.

Commits
-------

84fb250 escaped manually the shell arg (fixes #93)

Discussion
----------

escaped manually the shell arg (fixes #93)

I've been able to dig into my issue (#93), the stack trace is pretty explicit, at some point it tries to execute ```git show -s --pretty=format:" H n an n ci n s n" "ac86c6368c8b1ed
27adb436af54d0398b64cab1f"```, the format is wrong, percents (%) are missing, it's because I'm on windows, and ```escapeshellargs()``` is replacing percents by spaces (https://github.com/fabpot/Sismo/blob/master/src/Sismo/Builder.php#L120).

I'm suggesting to remove the call to this function, this parameter is hardcoded (plain string) so can't it be trusted? What do you think?

BTW: thx for this great tool!