caja-share should be installed by default

[sjgcit]

On Linux Mint 18 caja-share is not installed by default. This makes it tedious to get (simple) file sharing up and running. The simplest option would be to make caja-share installed by default with caja.

Relating to this note https://bugs.launchpad.net/bugs/1647518 which will also inhibit the ability to easily operate file sharing for most users.

I might also add that installing caja-share from Synaptic does NOT get it running properly. You have to logout completely and start again to get caja to offer file sharing. Simply closing all caja windows does work - it looks like the whole desktop has to restart to get caja-share up and running properly. Again this inhibits the ease of getting file sharing up and running.