conditionnally install appdata files

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
silence clang warnings

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
Update German translations
update THANKS

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
libgpaste-core: improve growing lines

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
update NEWS

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>