Use default Ruby version locally

Assume that each developer can keep their local Ruby version up to date
instead of mandating a particular one and chasing after the facts all
the time.
Corrects UnusedParameter with keyword arguments with splat

Corrects an error where the UnusedParameter smell was flaged when it
should not have been when the method parameters included a keyword
argument with a splat.

Fixes #262
Merge pull request #272 from gilles-leblanc/issue262

Corrects UnusedParameter with keyword arguments with splat
Consider block parameter for DuplicateMethodCall

This catches cases like the following:

    foo {|a| a.bar}
    foo {|a| a.bar}

In addition, the following cases become extra smelly since the whole
iterator is considered smelly, in additon to `foo.bar`:

    foo.bar {|a| a.baz}
    foo.bar {|a| a.baz}

One consideration is whether the following case should still be
considered smelly:

    foo.bar {|a| a.baz}
    foo.bar {|a| a.qux}

With the present change, this case stays smelly as it was before.
Update README

* Use bundler in test running examples
* Use Markdown's numbered list
* Wrap long lines
Update gemspec

* Fix dependency versioning warnings
* Fix license warning
* Improve description formatting
* Remove post install message
Merge pull request #278 from troessner/update-readme

Update README
Merge pull request #273 from troessner/remove-ruby-version

Use default Ruby version locally
Merge pull request #277 from troessner/fix-gemspec-warnings

Update gemspec
Make reek run warning-free

Enables warnings during the spec run, and fixes the following warnings:

* 'circular require considered harmful' due to some needless requires
* 'copying extra states' warning when using Hash#reject
* 'character class has duplicated range' warning due to using match
  matcher with a string argument
Merge pull request #283 from troessner/circular-dependencies

Make reek run warning-free
Merge pull request #274 from troessner/duplicate-block-method-call

Consider block parameter for DuplicateMethodCall
Added html file output

Fixed some problems

Fixed more things
Merge pull request #285 from SkuliOskarsson/html_output

Added simple HTML output