Provide escapes for special characters

[zeborah]

eg #, $, {, } etc

[ajk]

Fixed in changeset:28939ac15506b95f59142a06b7d6794a801f8198:

The variable "_" refers by default now to a structured value having the following members:

• hash containing "#"
• dollar containing "$"
• obrace containing "{"
• cbrace containing "}"

So, for example, $_.dollar$ in a template will, in general, expand to the dollar sign.

[zeborah]

Still not working for me (either braces within $def head_custom()$ or for replacing %23). But while I was testing it I thought of the obvious alternative way of getting css in there, which works fine once I stop typoing, so probably not urgent.

[ajk]

Deployment error, fixed.