add :tag-root-uri :page-root-uri :post-root-uri parsing
replace {entity}-root with {entity}-root-uri parameters to set uri
fix root-path call
fix root-path function params order
(worked erlier because of keyword<->map transposition)
fix keyword :{entity}-root-uri to :{entity}-root transformation
misprint: congig -> config
add function to compose file path
add create-file function
add function to compose a path
handle empty blog-path using path function
fix filename for preview
