Some work turning doc strings into Sphinx docs.
Fix error in use of file_name as a list
Add more tests of using lists of catalogs
(#10)
Add warnings if supposed list of catalogs is empty list.
(#10)
Better setup of the basic doc hierarchy
(#9)
Some tweaking of doc strings to make them look ok in Sphinx
(#9)
Merge branch 'master' into #9

Conflicts:
	.gitignore