When `clean-urls?` is set in config, emit pages as subdirectories
`prefix/root/page-name/index.html` instead of
`prefix/root/page-name.html`. Links in emitted HTML then point to
`prefix/root/page-name/`. When `clean-urls?` not set, behaves as
before.
Refactor most URI generation into a new `page-uri` function.
`page-uri` replaces most calls* to `path`, all calls to `post-uri`
and all calls to the old `page-uri`.
Introduce function `create-file-recursive`. Function creates
file parent if not exists.
Introduce function `write-html`. When `clean-urls?` is set, spits
emitted HTML into subdirectories as described above; otherwise
behaves like `create-file`. Replaces most* calls to `create-file`
Calls `create-file` or `create-file-recursive`.
* Exceptions made for sitemap XML and RSS feed XML pages
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
