User manual: Updated text

This patch contains some updates to the user manual to reflect the new
images that were submitted previously. The updates include:
1) Moving the "Load Photos" section to the section daling with the input
   of dive information (photos qualify as additional dive information).
2) Changing the wording around the new button in the tool bar.

Signed-off-by: Willem Ferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
User manual: add latest html files to git tree

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>