The moving target of OS support

[Daniel van Vugt]

All,

In the past we've made decisions to adopt new language variants and 
dependencies for Mir that meant only users on the latest Ubuntu release 
could build the latest Mir code. And if the latest Ubuntu release means 
the pre-release then we're probably excluding most Ubuntu users from 
being able to build the Mir code and getting involved.

In early development that's fine, but I'm wondering if we can agree to 
aim for some solidification. For example, should we say that after 
Ubuntu 16.04 LTS is released all Ubuntu releases thereafter should be 
usable for doing development on Mir? Or just the latest LTS plus the 
latest release (ie. follow the Ubuntu support schedule)?

- Daniel