Add gitignore for idea and intellij files
Add beaker-rspec tests
Parameter spec test
(maint) Remove rspec 3 deprecations

Rspec 3 deprecates `be_true` and `be_false` because they
actually behave like `be_truthy` and `be_falsey`[1].

This commit uses changes them to match exactly true or false.

[1] https://github.com/rspec/rspec-expectations/issues/283
Merge branch 'travis-specs'

* travis-specs:
  (maint) Remove rspec 3 deprecations
  Parameter spec test
  Add beaker-rspec tests
  Add gitignore for idea and intellij files