Refactoring: changing associatedName to nickname
Saving nickname in CDUser property instead of UserDefaults
Added ProfileManager (loading/saving tox data, creating/switching profiles), ProfilesViewController
ProfilesVC: renaming and deleting profiles
Filtering CoreData object with profile
Implemented profile import from another app
Renamings, small profile fixes
Fixed crash on profile change
ProfilesVC: exporting profiles
Merge branch 'master' of https://github.com/dvor/Antidote
README updated