* First of a few commits to allow for evaluating arrays of arbitrary
  types
* Adds support for 32 bit integer arrays

First of a few refactors to allow multiple clients / frontends for
Delve. Current implementation now uses a cli client, but conceivably we
could have an http or socket based client as well.

Since fixing scheduler handling bugs, a new bug was exposed where Step
was calling Clear off of the DebuggedProcess struct. This is incorrect,
 and should be handled by the thread itself and not delegated.