Improving the way we parse the contacts

fix #1
fix #2
Merge pull request #3 from rnowm/master

Markup for Welcome screen
Cleaning a bit
Revisited basic functionality
Closing window button
Closing auth window when no authorized
Enabling cancel
Importing the images!! We forgot about them :O
Adding improvement regarding the main contacts group
Making one of the cancel button to go back to the app home