Impliment suggestions on larp data schema.
type Either struct
yproc/yield use chan Either, to propagate errors.
test for yproc/yield use chan Either, to propagate errors.
Merge pull request #11 from MrWerewolf/larp

Impliment suggestions on larp data schema.
class.go.  Simple classes, no slots.
Underscore vars are object member vars.
Use inheritance chain to find method.
Use filename @wiki for all wiki, mixin src, and db files.
Allow more backslash escapes, that just return the char escaped.
More standard backslashes: a, b, v.
subst command ( http://www.tcl.tk/man/tcl8.4/TclCmd/subst.htm )
Verb/edit uses ht style.  Fix empty html tags.