fix virtualPositionInventoryShort

Merge remote-tracking branch 'origin/dev-gmx-trade' into dev-gmx-trade

update release_note.md and setup.py for version v1.3.9

update structure.md

add gmx bigquery source code, not publish, todo update tick _process_one_day function to compatible rpc

add gmx v2 position log deal code.

update structure.md

add gmx bigquery source code, not publish, todo update tick _process_one_day function to compatible rpc

add gmx v2 position log deal code.

Merge branch 'master' of zelos-alpha.github.com:zelos-alpha/demeter-fetch

v1.3.8

add gmx v2 position log deal code.

update version

fix issue in gmx v2: when long token == short token, pool amount is incorrect

fix issue in gmx v2: when long token == short token, pool value will be nan