simplify example
tag every log entry with a CSS class for whether it came from Node.js or Chrome, then give them unique background colors
bump version to 0.2.9
instead of recreating the DOM every time a log entry arrives, retain pointers to the DOM nodes where children of existing log entries should be inserted and only add the new entries
ignore node_modules once again
Merge remote-tracking branch 'origin/efficient-log'

Conflicts:
	examples/index-ajax.html
automatically scroll the log if the log is scrolled to the bottom