GNS3 version 1.5 release candidate 1 has been released.
The major new features of 1.5 are:
Other important changes since 1.5 beta 1 are:
pip3 install gns3-gui==1.5.0rc1 pip3 install gns3-server==1.5.0rc1
sudo add-apt-repository ppa:gns3/unstable sudo apt-get update sudo apt-get install gns3-gui