first part of code organization - (layout functionality almost complete)
Treat this code careful! Not complete the refactor process yet.
Merge remote-tracking branch 'refs/remotes/origin/architectureRemodelation'

Conflicts:
	nearTweetClient/src/pt/utl/ist/cm/neartweetclient/ui/LoginActivity.java
	nearTweetClient/src/pt/utl/ist/cm/neartweetclient/ui/TweetsStreamActivity.java