Urb app home fragment

Many things :+1: 
 - Merge with Nicolas branch so now can see local projet on a map, geolocalized
 - check if there is connection to the internet
 - load and save to servor image (caution, have to put the file in serveur PHP in a apache servor on your pc and put the right ip address in Uploadactivity.java !)

Known issue : not good image load in loadLocalPhoto but implemented just to let the others knows how to load a picture
Have to interpret all exceptions in upload/load images !