Added Class commands

Get-SevOneDeviceClass and Get-SevOneObjectClass.

There is still a lot of work to be done exploring the API, I'm not even
sure what the Classes are for.  I'll be adding a manifest and a types
file later today as I wrap up the Version 1 release.
Remove-* functions

Added a bunch of remove functions to eliminate some SevOne elements (not
sevone elements, just a general word).  They all have a high impact
built in and support should process.
Added get-sevonePeer

Just gathers info on existing SevOne Peers
Fixed Scope issue

All the $sevone references failed because they weren't hitting the
global scope.  Turns out none of the functions really worked prior to
this revision... oops.

The issue was masked in my testing as I already had $sevone defined in
the current context.  Anyway, it's fixed now and you are able to import
and run the module.
New Device

The New-SevOneDevice function has been added.  There are some fixes to
get-sevone device in this commit as well.  The behavior is still buggy
though.