Session/Day VWAP & Std Dev Bands

/VWAP and Standard Deviation Bands for intra-day & Day sessions
/Intra-day sessions be default are set to crypto
- Asia session
- London Session
- New York Session
- Close Session

Day broken up into sessions as a 24 hour period consists of different market participants and therefore different behaviour.

版本注释:

Changed sessions to just Tokyo, London, New York.
Updated code structure.