Added admin message

Brought in a custom kernel for writing tests in

Snapshotting and virtual memory writing

Added precisions snapshot ability

Optimization around not querying HV dirty pages if we haven't run the hypervisor since the last query

Added fast snapshot/restore capability

Conditionally use xsave feature set

Disable xsave in guest for now

Misc perf improvements, added option to devnull display output to speed things up

Prettied up and sorted coverage printouts

Coverage overhaul... now it costs almost nothing to gather

Should now only conditionally use xcr0

Including test OS as a binary with the project, it's tiny so it's fine

Improved error information for setregister failure

Updated build/run guide