$Host variable
REFACTOR: Remove unneeded empty public ctors.

I'm just cleaning up after the LaunchPad merge.
REFACTOR: Mark a field as `readonly`

I'm just cleaning up after the LaunchPad merge.
FORMATTING: Remove some unneded parens.

I'm just cleaning up after the LaunchPad merge.
Merge pull request #72 from JayBazuzi/dollar-host

Create `$Host` and some code cleanup