feat(Subscribe) - Autolog new user.

Automatic log user when subscribe.
Redirect to guide page.
Delete subscribe MP.
Change link between guide to forum.

Trello #16
feat(subscribe) - Autolog new user.

Merge branch 'Review-subscribe'
Automatic log user when subscribe.
Redirect to guide page.
Delete subscribe MP.
Change link between guide to forum.

Trello 16.
https://trello.com/c/bwlbOr64