New snapd release 2.24

The Snappy team is happy to announce the availability of snapd 2.24!
After some maintenance releases during the 2.23 series we focused in 2.24 on new features again.

Some of the highlights:

• fix potential transition issue from ubuntu-core to core
• work towards improved aliases
• (many) cross distro improvements
• fixes to work better with gnome-software
• improve internal interfaces code
• detect devmode by inspecting the apparmor support in the kernel
• test improvements
• allow chroot in base template
• fix pi-config.* core settings and add some more
• interface updates: browser-support,unity7,framebuffer,location-observe,location-control,browser-support,mir,opengl,unity8
• new interfaces: joystick,maliit,autopilot