<endContent> element for custom JavaScript files before </body>.

Added documentation for adding custom CSS/JavaScript files. Fixes #23.
See also discussions in #18 and #17.
local jQuery JS without version - allow replacing with custom one
avoid local jQuery fallback for simplification
<localResources> flag to force local Bootstrap/jQuery.

Also added local Bootstrap versions to the skin when `localResources` is used.
force disable highlightJs when `localResources` is used.

The highlight.js CSS/JS will have to be added manually, e.g. via decoration.body.head.
do not package localResources files - they cannot be easily overridden.

The skin files cannot be easily overridden with local files - see the issue https://jira.codehaus.org/browse/MSITE-702 for more details. Currently will require users to provide their own CSS/JS files for Bootstrap and jQuery.
documentation on <localResources>
cleanup rogue comment
fixed spaces vs tabs
Merge branch 'local-resources'