proper parsing when chaining method calls
added error logging when rendering and the ability to configure the logger
Added some support for the time package

time.Now() works, as do the various durations:

   <%= time.Now().Add(time.Hour * time.Duration(6)) %>

This required more hacking than I had hoped and also required some special
for time.Duration to support operations.

I think this could be generalized by seeing if both sides can be converted
to int64, doing the operation, and converting the result back to the original
type...