Add webmock, sinatra, rcov to Gemfile
Redirect all requests to offline chef app
Add json fixtures as chef responses from offline-cache.zip
Remove uneeded stubs from NodesController
Remove uneeded stubs from MachinesController
Override test env constants for specs to work
Models finders specs

Excercises mostly the offline chef module functionality
Node controller specs
Crowbar controller specs
Chef object specs
Crowbar service specs
BarclampController#index specs
Handle missing attributes in NodesController#update
Comment out failing barclamp_index spec until its clear it is needed
GET update now raises UnknownHttpMethod
Check if key required in license_key setter
Refactor to use new license_key setter
Allow setting node params to nil in NodesController#save_node
Set platform to a default if nil passed in NodesController#save_node
Update tests to reflect the edit -> bulk rename