[lib] add headers parameter to foundation pages

Conflicts:
	lib/foundation.ml
[lib_test] fix up to new headers parameter
whitespace
whitespace
whitespace
[lib] add merlin
[lib] rework blog support

Conflicts:
	_tags
	setup.ml
[lib] permalinks begin with '/'
[lib] fix links in atom feed
[lib_test] update to `lib`
[make] finish separation of my site