move facts code to facts.py
move non-core goals to goals.py
remove old strategies code
rearrange goals in goals.py
remove setaddo

This was unused and not particularly well written
squashme
rearrange functions in core.py
doctests in core.py
doctests in facts.py
doctests in assoccomm
Merge pull request #18 from mrocklin/corecore

Corecore
simplify intersection
simplify earlyorder()
unique_dict -> unique(..., key=dicthash)
version 0.1.8
minor edits to README

add data structures section

add knowledge representation subsection

remove extra membero example

add --with-doctest to nosetests
import isvar in __init__.py
version bump 1.9
goalify and resulting typo/isinstanceo goals
hashable