* data v2.2.1 - 'live' parameter for exchange, payment volume
* data v2.3 - rippled versions method
* data v2 - mark live as new in 2.2.1
* data v2.3 - merge 2.2.1 changes into v2.3
* data api 2.2 - ported docs from upstream (some edits)
* Data API v2.2 - some cleanup, API tool methods (incomplete)
* Data API v2.2 - more cleanup (draft done)
* Data API v2.2 - minor cleanup
* Data API tool - fix 'a transactions' typo