Re #29 - Added `_tail` tag
Abstracted tag initialization with post-tag calls - handles several tag cleanup, validation concerns.
Updated onScope with updated data schema
Updated minimum Panzer version to 0.3.7
Re #14 - proxy.wait() supports pass-through of callback arguments
Moved node.cb initializer to encapsulating method, since node initialization uses (faster) loops, not a .forEach() closure
Re #28 - Implemented proposals A & B: added ending slash and persisting dynamic queries via .toString()
Fixes #23 - patched shared-redirect handler to work with proxy as the scope