User manual: Add section on dive log storage in the cloud using dropbox

Some other dive log programs present storage of dive logs on the Internet
as an important feature. Therefore this text.
One image was added.

Signed-off-by: Willem Ferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

2 files changed, 36 insertions, 0 deletions

diff --git a/Documentation/images/Cloud.jpg b/Documentation/images/Cloud.jpg
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diff --git a/Documentation/user-manual.txt b/Documentation/user-manual.txt
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@@ -1915,6 +1915,42 @@ size and theme.
 Export to other formats can be achieved through third party facilities, for
 instance _www.divelogs.de_.
 
+[[S_Cloud_access]]
+== _Subsurface_ in the Cloud
+
+For each diver, dive log information is highly important. Not only is it a record
+of diving activities for one's own pleasure, but it is important information required
+for admission to further training courses or (sometimes) even diving sites. The
+security of the dive log is therefore critical. In order to have a dive log that is
+resistant to failure of a home computer hard drive, loss or theft of equipment, the
+Cloud is an obvious solution. This also has the added benefit that one can access one's dive
+log from anywhere in the world without having to carry it with oneself. For this
+reason, facilities such as _divelogs.de_ and _Diving Log_ offer facilities to store
+dive log information on the Internet. Although _Subsurface_ does not offer integrated
+Cloud storage of dive logs, it is simple to achieve this using several of the
+existing facilities on the Internet.
+
+For instance
+http://www.dropbox.com/[_Dropbox_]
+offers a free application that allows
+files on the Dropbox servers to be seen as a local folder on one's desktop computer.
+
+image::images/Cloud.jpg["FIGURE: Dropbox folder",align="center"]
+
+Currently there are not costs involved for this service. In this
+case, one can store one's dive log on _Dropbox_ in a totally seamless way: a dive log in
+one's _Dropbox_ folder can be opened and saved directly by _Subsurface_ and it can
+be accessed from any place with Internet access. Dropbox (Windows, Mac
+and Linux) can be installed by accessing the
+http://www.dropbox.com/install[_Install Page on the Dropbox website_]
+. Alternatively one can use _Dropbox_ as a mechanism to backup one's dive log. To
+Store a dive log in the Cloud, select _File->Save as_ from the _Subsurface_ main menu,
+navigate to the _Dropbox_ folder and select the _Save_ button. To access the dive log
+in the Cloud, select _File->Open Logbook_ from the _Subsurface_
+main menu and navigate to the dive log file in the _Dropbox_ folder and select the
+_Open_ button.
+
+
 [[S_PrintDivelog]]
 == Printing a dive log