Big features:
- Reliably start WinRM now!!
- Support Windows 10 x86!
Smaller features
- Improve README
- Don't power off the (virtual) monitor to save power
- Add Invoke-ScriptblockAndCatch and use it in postinstall scripts
Fixes and reorgs:
- Move all the packer stuff inside the packer/ directory
- Break out possibly-nonfunctional slipstream stuff to its own module
- Clean up broken bits in buildlab
- Clean up vestigial bits in wintriallab-postinstall
- Fix lots of broken pieces after encountering them one by one
- Fix RestartAction stuff in autounattend-postinstall
