Added a nyan cat formatter.
Made `whatthejeff/nyancat-scoreboard` a suggested package.
Merge pull request #133 from whatthejeff/nyan-formatter

Added a nyan cat formatter.
Add html formatter with passing example template
Add html pending example template
Refactor html formatter adding polymorphism

Now Formatter\Html has a factory that creates the appropriate report item. Each
report item knows how to print itself depending on the event result. The
factory passes the io object to the report item, so the report item can use the
io to write the output with it.
Add failed item to html formatter
Add constructor generator
Merge pull request #135 from MarcelloDuarte/feature/generate_constructor

Add constructor generator
Extracted template loading to provide extension points.
Merge pull request #138 from jakzal/code-generator-templates

Extracted template loading to provide extension points
Add html formatter option to application
Add some html templates
Add a header and a footer as suite events
Get broken and failed html reports to green
Move templates to Template folder
Implemented class name validator for describe command
Updated class name validator implementation. Fixes #129
Updated class name validator implementation.
Updated class name validator implementation.