Exclude devise modules
Move devise modules to individual classes
add tests for #85
Merge branch 'jartek-exclude_devise_modules'.

Fixes #78 #80 #60.
remove :rememberable from default devise modules. fixes #80
add test for disabling registration routes. fixes #70. document module exclusion process.
v0.1.31.beta1
add callouts section, add @jartek
Update README.md
Fix small error in documentation.

Both examples about how to exclude modules still had the modules to be
disabled (:confirmable and :omniauthable respectively).
Merge pull request #91 from edgarhenriquez/master

Fix small error in documentation.