Added Login-related js files
app for registration of a new user
app for login and session of authorization
Added Register-related js file
html added
added html for sing up form
deleted odd strings
upd previous
deleted odd strings
appCtrl added to the index page
updated dropdown
fixed submit
deleted odd comment
Implemented registration front-end validation
merge master into register
Fixed plast_level select
simple captcha
Added validation for user uniqueness
Resolved conflicts
merge master