Add export CSV to user manual

Mention the option to export in CSV format in our user manual.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Improve header wording for CSV export

Duration is better term than time for the length of the dive. Also
remove the repetitive word dive from some of the header fields.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Make Subsurface with a British accent work

Our workaround for the lack of a US-English translation breaks en-GB. With
this the British version of Subsurface should work as well.

Reported-by: Tim Wootton <tim@tee-jay.demon.co.uk>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Tell Qt4 that we really meant Utf8 when we said Utf8

How strange. Telling Qt4 to assume that all C strings are Utf8 apparently
isn't enough to convince tr() that the C strings we pass to it are Utf8.
You need to set that codec separately.

Fixes #503

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