Fixes with refresh, and welcome dialog
Merge branch '2013-10-21_oauth2' of
git@github.com:smartcampuslab/smartcampus.vas.portfolio.android.git into
2013-10-21_oauth2

Conflicts:
	src/eu/trentorise/smartcampus/portfolio/frags/PortfolioFragment.java
	src/eu/trentorise/smartcampus/portfolio/frags/PortfoliosListFragment.java