Updated Galician translations
server,media-export: Add support for dc:creator

Ability to add dc:creator is removed from subclasses and moved into
MediaItem.

https://bugzilla.gnome.org/show_bug.cgi?id=701637
Updated Czech translation
Updated Indonesian translation
server: Fix accidental ABI break

https://bugzilla.gnome.org/show_bug.cgi?id=703241
build: Bump vala version

Necessary for search_ns () in libxml2 vapi from commit 6a481ee

https://bugzilla.gnome.org/show_bug.cgi?id=704066
Updated German translation
Updated Norwegian bokmål translation
server: Always fill agent cache
doc: Add target to generate HTML manpages
Update .gitignore
Updated Greek translation
media-export: Don't leak fds in JPEG writer

https://bugzilla.gnome.org/show_bug.cgi?id=701948
Updated German translation
Updated Polish translation
Updated Traditional Chinese translation(Hong Kong and Taiwan)
tests: Fix for recent bugfixes
Updated Brazilian Portuguese translation
Updated Brazilian Portuguese translation
Tajik translation added