Revert "Update pybitshares dependency to version 0.3.0"

This reverts commit e58685d.

Change dexbot version number to 0.9.19

Change dexbot version number to 0.9.5

Change dexbot version number to 0.8.5

Change dexbot version number to 0.7.25

Merge pull request Codaone#378 from Codaone/dev

0.7.19

Change dexbot version number to 0.7.18

Change dexbot version to 0.7.9

Change dexbot version number to 0.7.1

Change dexbot version number to 0.7.0