Fixed big circle position
update repository README.md
Add example code for private event topic properties to bric template files
copy the Confluence documentation on adding new brix to doc/CreatingNewBrix.md
more tweaks to the {svg,html}BricTemplate
Add new tips.md in doc

Leslie has asked if I would try to write more documentation, and when I mentioned the tip about diff'ing the build log she thought that would be useful to document, so it's the 1st entry in tips.md