Updates to the user manual for Subsurface-mobile. Many new
figures have been brought in. The text has been overhauled
to include latest features and some features that do not
exist any more have been removed. Text has been added,
explaining the copy-and-paste operation (Thanks, Miika).
Signed-off-by: willemferguson <willemferguson@zoology.up.ac.za>
