init admin controller
Merge pull request #15 from pecorasilenzio/admin

init admin controller
update login/logout, users
Merge pull request #16 from pecorasilenzio/admin

update login/logout, users
update words
Merge pull request #18 from pecorasilenzio/admin#words

update words
update category
Merge pull request #19 from pecorasilenzio/admin#words

update category
:w
word_list