Remove non-existant paths
Improve structuring of the documentation generation

	* Relocate docs/types.md & docs/rules.md to Resources/Help
	* Relocate remaining docs dir to Resources/doxygen
	* Rename TTCARDS_DOCS_DIR to PROJECT_DOXYGEN_DIR
	* Change docs output dir to within build dir (ex: ttcards/build/docs)
	* Rename html output dir to html (was public)
	* Install targets for README.md, LICENSE.md, TODO.md and BUGS.md
	* Disable man pages generation