Add: Executor daemon base and host implementation

The executor daemon allows for implementable workers that profile
code. The host implementation is a stop-gap/testing implementation
that runs code directly on the host running the daemon without
using any form of virtualization/sandboxing.

Signed-off-by: Kevin Conway <kevinjacobconway@gmail.com>
Merge pull request #13 from kevinconway/host_executor

Add: Executor daemon base and host implementation