Refs #432. Categorize the 1.0 and 2.0 documentation.
Refs #432. Write a brief documentation intro and outline the structure.
Refs #432. Relocated all of the general and plugin documentation.
Refs #432. Moved the in_the_wild examples to appropriate sections.
Refs #432. Reorganized and rewrote much of the Quick Start
Refs #432. Wrote some more section-header content and fixed bad links.
Refs #432. Use a future_planning section instead of a Version 2.0 section
Refs #432. Split out the current from future development documentation
Refs #432. Fixed remaining broken :doc: links.
Merge pull request #432 from wymeditor/issue_432

Organized the documentation in a semi-logical manner.