Restructured the plugin system.
Multiple plugins can bind to the same hook now (not available for variadic hooks yet!)
The parser is now benchmarked. The bench_round4 is run with both plugin_markdown and plugin_bbcode enabled.
Added a benchmark for the BBCode plugin.
Moved some of the template writing logic into a more generalised function.
URLs are now recognised by the system and linked.
Converted more custom errors into LocalError calls.
Faster and less bandwidth intensive Emojis on Edge.
Fixed a bug with replies not working.