Lock 2.14 rspec and use mock instead of double for mocking.

In rspec 2.14 is mock deprecated and will be removed in rspec 3.0.
Merge pull request #21 from simi/rspec214

Lock 2.14 rspec and use mock instead of double for mocking.
Get rid of broken FakeFS.
Closes #20
Merge pull request #23 from simi/rbx_compat

Get rid of broken FakeFS. Closes #20
Add 2.0.0 to CI
Generator example group and recognizing files under spec/lib/generators as generator example group.
Merge pull request #22 from simi/example_group

Generator example group
Relax dependencies
Require rspec/core
Merge pull request #26 from bricker/master

Relax dependencies
Bump version to 0.9.1
Specify MIT license in gemspec
Bump version to 0.9.2
Fix Rubinius builds on Travis
Merge pull request #28 from petergoldstein/feature/fix_rbx

Fix Rubinius builds on Travis
Add Ruby 2.1.0 to Travis
Merge pull request #29 from petergoldstein/feature/ruby_2_1_0

Add Ruby 2.1.0 to Travis