1 - Fix unicode/wide characters confusing the perl compiler
2 - Ensure TT doesn't try and call methods instead of VMethods
5 - Fix concatenating undef to HTML::String values.
8 - Fix concatenating strings that evaluate to false in a boolean context.
11 - Optimise _hsv_dot since it gets called heavily by HTML::String::TT
14 - Localize $@ in isa and can in case of modules that mishandle eval {}
15 - Support for single quotes (' to ')