http://issues.liferay.com/browse/LRDOCS-327

http://issues.liferay.com/browse/LRDOCS-327

Added a section to the Themes chapter of the Dev Guide covering the Resources Importer. Added a Plugins SDK to the Dev Guide for code examples. Added a test-resources-importer-theme based on the test-resources-importer-portlet so developers can have an example.