ordering on aliases, with paging for alias.list()
use a dict lookup for page_token decoding
little fixes to alias paging, and drop the idea of a token, just go with int indexes
implement alias.shift() to reorder aliases, and update positions of other aliases when one is removed
little alias ordering fixes
relationship [re]ordering
finish that thought
node [re]ordering
bring up datahog.const.* to the top-level namespace