Fix configure error message
Fix 'export_to_common' dialog

Use a standard file chooser. This ensure to keep the right aspect of
the dialog (similar width and height).
Fix translatable string with variable argument

A good practice in translation is to avoid to concat strings but use
%s C format argument. This allow translators to decide where to put the
argument in the translated string.
QA: factorize trw_layer_acquire* functions

The module viktrwlayer is really huge. Any factorisation seems good,
even really small like this.

Furthermore, such minor refactoring would probably help to find
a more significant refactoring.
Fix the display of speed in statusbar output.
SF Bugs #104: Fix GStatBuf not available on Glib < 2.26
[QA] Remove build references to things that don't exist anymore.
Update spec file
Move man files from doc to help directory so they will be included in the output from make distcheck.