Added specs and examples for slim, almost passes, need to work out how slim handles dynamic hashes as html attributes so I can turn of automatic escaping of them.
Using a splat with slim makes the attributes correct but still escaped.
Removed Slim from the examples as I can't get the specs to pass and the project maintainers don't wish to be helpful, so removing official support. Added note in the Readme.
Merge branch 'develop'
Got rid of banal Bundler warning.
Run against Ruby 2.