Merge pull request #40 from infirit/master

pam: Use pam_gnome-keyring.so
Sync translations with transifex
Show date and time in lock dialog

Closes #18
https://github.com/mate-desktop/mate-screensaver/issues/18
Sync translations with transifex
Fix POTFILES.in
Sync translations with transifex
Bump version to 1.7.1
Include autogen.sh in tarball
Update Manual Page
Update Manual and make it more uniform with others
Update Manual and make it more uniform with others
Merge pull request #41 from hekel/master

Update Manual
Sync translations with transifex
configure: Add check-news
Update NEWS
Bump version to 1.7.90
Fix help button in preferences dialog.
Sync translations with transifex
Sync translations with transifex
Bump version to 1.8.0