Minor grammar fixes

Signed-off-by: Benjamin Ruston <benjy.ruston@gmail.com>
Merge branch 'master' of https://github.com/laravel/docs into bruston-docfix
Merge branch 'master' of https://github.com/laravel/docs into bruston-docfix
Mass upstream update
Merge pull request #181 from bruston/bruston-docfix

Minor grammar fixes