Removes fuel core folder and files
Changes fuel core to be a submodule
Removes fuel orm package folder and files
Changes fuel orm package to be a submodule
Removes fuel auth package folder and files
Changes fuel auth package to be a submodule
Removes fuel oil package folder and files
Changes fuel oil package to be a submodule
Removes fuel parser package folder and files
Changes fuel parser package to be a submodule
Removes fuel email package folder and files
Changes fuel email package to be a submodule
Removes docs from gitmodules file
Fix invalid reference to old seller event service.
Fix incorrect property name on the callback object when an event is triggered.
Add try/catch for event callback requests.
Merge pull request #12 from dmyers/submodules

Changes fuel core and packages to be submodules.