Remove special character

Remove special character of "translatetoenglish.rb" and
"gemtranslatetoenglish.gemspec".

Signed-off-by: Gustavo Toshi Komura <gustavo.toshi.k@gmail.com>
Add "action_controller" as dppendency

Signed-off-by: Gustavo Toshi Komura <gustavo.toshi.k@gmail.com>
Add test to translate function

Signed-off-by: Gustavo Toshi Komura <gustavo.toshi.k@gmail.com>