* fix: boolen test works even for sqlite results (tx Emyr Thomas for the idea)
* fix issue with loop.xx variables in templetor (Bug#476708)
* hide unwanted tracebacks in debugerror
* display correct template line numbers in debugerror
* new utilities: counter, safeiter, safewrite, requeue, restack (by Aaron Swartz)
* various form.py fixes and improvements
* automatically escape % characters in the db query (Bug#516516)
* fix non-deterministic template order (Bug#490209)
* attachment support for web.sendmail (tx gregglind)
* template.py optimizations and extension support