Fix travis.ci errors
Remove "--quiet" option from wkhtmltopdf bin call

The "--quiet" option was causing the error "Unknown long argument
--quiet" on wkhtmltopdf version 0.8.3 installed in Mac OSX Mountain Lion
when trying to convert a markdown file.
Use the -q parameter for wkhtmltopdf
Update specs
Fix garbled characters with code blocks including utf-8 strings
Add require to make tests pass, since they don't require everything in gemfile.
Bump version
Merge branch 'development'