translate controller.md & errors.md
add space after words
Merge pull request #5 from appleboy/patch

update some doc.
翻譯 Validator 與語意修正
Merge branch '4.2' of github.com:laravel-taiwan/docs into 4.2
翻譯 Validator 與語意修正
Merge pull request #6 from jasteralan/controller_error

translate controller.md & errors.md
update doc from laravel/docs @ c528573b

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>