Changes for latest org-mode HTML export
Remove trailing &nbsp; from table-of-contents links
Get fragment ID's for new org-mode export
Rebuild production JavaScript
Switch build to using lein-cljsbuild

Eliminate Clojure sources just used for building.

One consequence: there is no build-time step to copy CSS files from
src/css to production/
Update production JavaScript files
Update & reformat README, recommend Emacs 24+ and Org-mode 8+
README: Add missing tags:t option to org-mode example

Necessary in org-mode 8 to get usable HTML output
Update example.org syntax for org-mode 8
Fix command for org-mode HTML export in org-mode 8
README: remove unnecessary `lein deps` command
README: add link to emacs23-org7 branch
README: reformat change log, add initial release
README: fix syntax of bullets in change log