devise style developments

also generate devise views, add 2 menu partials
add root page, create page users to show all users
add name, user_name fields and set up to devise
change styles into edit profile view
unique user_name
add current_user to account_update

This fix problem (current password can't be blank).
g friendship
Add friendship
improve add_if_not_current
add styles to users
improve friends/users style
Merge branch 'users' into stage
generate models for conversation
user_conversation
problem with create action
add creating conversations ! not finished

problem with to in model UserConversation
change rutes
user can send messages to conversation

Bug with creating conversation (only one user in) still here
Conversations with many people
fix bug with remove/add friend