Clean up README.

- move RubyGems link to version badge
- properly separate Installation & Usage sections
- fix identation issue and typo
Add a proper license to gemspec
Bump version and date
Fix gem installation typo
Merge pull request #1 from chaselee/patch-2

Fix gem installation typo
Merge pull request #9 from olivierlacan/patch-1

Clean up README.
Update README.md
Upgrade to recent deps, fix debugging
Add bundler tasks and default
Add .ruby-version, .ruby-gemset to ignore
Remove empty factories file
Remove stray ruby-debug require
Retool spec_helper
Convert specs to RSpec 2.14.8 syntax with Transpec

This conversion is done by Transpec 1.13.1 with the following command:
    transpec

* 7 conversions
    from: obj.should
      to: expect(obj).to

* 2 conversions
    from: == expected
      to: eq(expected)

* 1 conversion
    from: > expected
      to: be > expected

* 1 conversion
    from: lambda { }.should
      to: expect { }.to

* 1 conversion
    from: obj.should_not
      to: expect(obj).not_to

* 1 conversion
    from: obj.stub!(:message)
      to: allow(obj).to receive(:message)
Add shoulda-matchers and activesupport
Move ambassador_spec
Rewrite base_spec.
Remove whitespace from mbsy_spec
Rewrite ambassador spec
Remove dead code