run-codesniffer overhauled.

* Output directory changed.
* Logic simplified.
* Now checks Shells and Tasks.
* Option stubbed to cause script to exit >0 when sniffs fail. (For future use in "strict" Travis runs.)
Merge pull request #27 from loadsys/f/codesniff-improvements

run-codesniffer overhauled.
Updates Composer File

Drops the PHP depedency
Updates the Loadsys CodeSniffer to the 1.0 branch
Closes #28

Signed-off-by: Justin Yost <justin.yost@yostivanich.com>
Merge pull request #30 from loadsys/f/update-composer-file

Updates Composer File
Adds a new "robustness" script for running composer-install.

Not entirely useful since you will have already had to run `composer install` to have this script available, but a nice reference.