Made a flag is_strategic in object.update() (#45)

* comment

* test git push

* add not stragic update option

* clean up comment

* update a unittest

* cleanup comment

* clean up unnecessary modifications

* delete unnecessary spaces

* unnittest on progress

* update unittests for objects and ultility, fixs a bug in is_strategy

* update some unittests

* fix unittest

* simplify logic in update to keep it clean

* Delete Pipfile.lock

No need to merge pipfile

* Revert "Delete Pipfile.lock"

This reverts commit 024c328.
to retrieve the pipfile.lock

Author: wnykuang