* Generate galaxy.yml based on single source of truth
* Fix up tests and align file names
* Minor Makefile tweak
* Remove link in galaxy.yml file and make it a template file
* Moved collections docs to dev_guide
* change Makefile clean path
* Added readme to example meta file
* review fixes
* Use newer style for doc generation script
* Fix mistake in dev_guide index
* removed uneeded file, fixed links and added preview banner
* Moved banner for sanity test
