Fixed and wrote test for merging default options with controller-provided options
Fixed spec/widget_helper so the test_controller could be created in before :each
Made tests and exception for invalid model case
Added basic event functionality test: spec/widget/apotomo_datatable_widget_spec.rb: "should respond to event triggers"
Started spec/widget/merge_options_spec.rb for testing various cases of merging options
Created tests for merging options from the view and the url
Updated views to use merged_options variable