remove option documentation for locale_provider

It actually has no options.
Fixes #545
Merge pull request #546 from greg0ire/proofread

remove option documentation for locale_provider
Changed pluraility of "option" in token providers doc
Fixed grammar error.
Merge pull request #547 from maxolasersquad/patch-1

Fixed grammar error.
Merge remote-tracking branch 'origin/master' into dev