Merge pull request #6 from talex5/master

Link to pre-built binaries
Also install libssl-dev so that we have all the necessary Mirage-www default base packages
Merge pull request #8 from avsm/master

Also install libssl-dev so that we have all the necessary Mirage-www defaults
Create LVM volume group on first boot

This means we can adjust to the size of the device.

Closes #4.