Move packages and their versions into a path hierarchy; drop 'index.html' where it would be inferred
Make Home page absolute '/' and fix O2wTemplate.prepend_root to respect absolute paths
Merge cmdliner for meta generator feature
Basic tag predicate support
Extract page template and repo index into templates; implement simple XML template system
Merge branch 'preds' into template

Conflicts:
	CHANGES
	src/o2wRepository.ml
	src/opam2web.ml
--pred is now --where
CHANGES
If no files to generate stats are provided, don't generate stats
Merge pull request #50 from dsheets/template

Indexes, Predicates, Templates