Remove .mo files from Git, they are generated.

.mo files are the compiled .po translation files and should be
generated during the build process.
Move translation files
Generate .mo translation files during build process.
Add gettext translation managing tasks.
Add task for re-merging the .po files with the master .pot file.
Run xgettext on our sources and re-generate the .pot master file.
Update all the .po files with the master .pot file.
Fix po headers of .po files
Start translation guide
Install the .mo files with the correct naming.

The .mo files’ names must match the textdomain given to Gettext’s
bindtextdomain() function, otherwise they won’t be recognized.
I18n task reorganization
Update .pot file against latest sources
Create SMC Translation guide.
Start work on German translation again.
Add appendix on how to create POT file
Introduce pluralisation to SMC i18n.

New PL_() macro.
Update .pot file
Update German translation
Remove outdated comment
Add Finnish translation.