Added ImportProgress and ViewFile activities

ImportProgress and ViewFile activities are added alongwith their menu
files. They are meant for showing the progress of import of dives and the
imported dives / logs respectively. All appropriate changes are made. But these
are just skeleton UI with does not work now.

Signed-off-by: Venkatesh Shukla <venkatesh.shukla.eee11@iitbhu.ac.in>