Use cwrcRootUrl, rather than hardcoded path.
Changed js tree to be un-responsive until the css actually works with lower resolutions.
Allow baseUrl for require.js to be configured dynamically

By not specifying a default and instead using the default behaviour
(when using data-main, as the entry point) as noted here:

http://requirejs.org/docs/api.html#config-baseUrl

Projects that extend the CWRC-Writer will be able to provide their own baseUrl
config.
Fix for RDF XML namespace attributes generated when saving.

This is due to using the namespace prefix in the default namespaces and
then adding them again when building the RDF string.
Merge branch 'issue-229' into islandora_markup_editor
Merge branch 'issue-230' into islandora_markup_editor