Should keep composer.lock in the repository.

See: https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file
and
http://stackoverflow.com/a/12896850
Merge pull request #4 from cthos/composer-lock

Should keep composer.lock in the repository.
Added composer.lock file
Removed composer.phar file
Changed readme to just install dependencies using composer installed to system
Update titleize() to allow any separator string.
Update titleize() to replace separators before capitalizing words (ensures all words get capitalized).
Rename seller events to seller callbacks (table migration, model, service, validation and API).
Add a magic toString() to the event model.
Add a link() helper method to the seller callback model.
Add UI for managing seller callbacks.
Merge pull request #6 from dmyers/composer-lock

Added composer.lock file
Merge branch 'master' of https://github.com/volcano/billing
Fix incorrect variable names in customer product option service.
Merge pull request #5 from dmyers/composer-phar

Removed composer.phar file
Merge pull request #7 from volcano/feature/seller-callbacks

Seller Callbacks Improvements - Requires new migrations to be run.
Update README.
Removes fuel core folder and files
Changes fuel core to be a submodule
Removes fuel orm package folder and files