[CHORE] Refactor withdrawal processor to loop, use transaction.
[DOC] Add pm2 module to install docs.
[FEATURE] Wait for withdrawal to finish processing.
Merge pull request #94 from ripple/withdrawal-loop

[CHORE] Refactor withdrawal processor to loop, use transaction.
[CHORE] Bump patch.
Merge branch 'master' of github.com:ripple/gatewayd
Merge branch 'master' into api-core
[CHORE] Bump data-sequelize package version.
Merge branch 'master' into api-core
[BUG] Fix start to be startGateway in api.
[CHORE] Cleanup whitespace.