Modify Lua module loader to trace each variable operated on in every loop

[naturallymitchell]

whenever a table is used as an argument and a loop is done over it, add a log.trace() for the current object in the loop. if it has a name, then use that for the log message, like
https://github.com/foundpatterns/lighttouch-base/blob/3df4388e79f98e2ed364329179d41d910edc77e7/loaders/classes.lua#L1-L2

similar to #167

[naturallymitchell]

also related to https://github.com/foundpatterns/log.lua/issues/1
https://stackoverflow.com/questions/30499774/tracing-methods-execution-time
"code weaving"

[naturallymitchell]

move to jazzdotdev/jazz-libs#2 with #212