1) Register:
   -Registration command added to Commands
   -User now has "mewUserJSON" method, purpose of which is to create JSON with User fields, which can be recognized by server
   -RegistrationActivity has Register AsyncTask, which registers user and signs automatically

2) Log in
   -DispatchActivity now tries to get username/password from last session and log in with it
   -Username/Password are saved in SharedPreferences, look at TaskManApplication class for more info
3) Log out
   -Log out is now available from MainActivity. It clears Username/Password info and opens LogInActivity
4) View projects
   -Projects are fetched from server using getProjects Command
5) Add projects
   -AddProject dialog can now be opened from MainActivity
   -Adding projects is performed by AddProject Command
6) JSON Serialization
   -JSON Serialization added for all model classes