Update formatting of method docblocks.

Updated the formatting of the method docblocks.
Update documentation.

Updated the documentation; fixed typos and added contributing
guidelines.
Update documentation.

Updated the documentation to include more details about attachment
objects.
Update attachment class docblocks.

Updated the docblocks of the methods inside the attachment class to give
a better description of what the methods actually do.
Update documentation.

Updated Stapler's documentation for 1.0.0