Moved #add_class, #has_class?, and #remove_class methods from Kramdown::ElementRt to Kramdown::PatchElement so that we can use it everywhere we use kramdown.
Use new Kramdown::Element methods to manage class attribute.
Use in-place string manipulation methods for better performance
Improve error reporting when comparing kramdown::elements
Merged repositext-validation into this gem/repo.
Merged repositext-cli into this repo
Fixed missing l_var in report command
Updated .gemspec for validation and cli dependencies
Added more code from repositext-validation
Renamed consolidated gem from repositext-kramdown => repositext. This integrates repositext-kramdown, repositext-cli, and repositext-validation into a single gem/repo.