fix desktop files

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

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
gpasted: rename to gpaste-daemon

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

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
move some sources around

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
move legacy to top dir

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