Initialize static member variable in Seen_table

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Do not abuse the copy constructor to get a new generation

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Add a move-constructor to Seen_table

We are noncopyable but want to be moveable

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Add generation getter to Seen_table

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Replace noncopyable with explicit deletion

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Enable testing in global CMakeLists.txt

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Change compiler flags

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Add unittests for libmue

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>