Make apache mod_rewrite optional (default: on)
Introducing %curr_dir_url% macro for linking plain files, which are placed under the same directory where the actual markdown file is. (Including it's source.)
Make Unicode file and directory names available.
Merged Upstream (ModRewrite,curr_dir_url,Unicode page names patches carried forward).
Fix array name: config -> settings
Merge branch 'master' of https://github.com/gilbitron/Pico
Merge branch 'master' of github.com:picocms/Pico
Merge branch 'master' of https://github.com/dlazesz/Pico into dlazesz-master

Conflicts:
	lib/pico.php
Merge branch 'dlazesz-master' into parse_down