Support for Slovene language

Created from english.coffee
Update for Slovene language

Also added slovene.coffee in client/t9n
Added Incorrect password translation
Changed some wording
Updated male/female addressing messages
Translation for "Email already exists."
Added translation for "User not found" to error:
Added t9n on error message
Added translation for "Email is required"

Also deleted some from "error:"
Merge pull request #184 from alesvaupotic/master

Support for Slovene language