* Deleted SQLStorage class added Connection Manager, abstracted Wallet over SQL storage
* Use ConnectionProvider, open and close connections per operation
* Replace fileExists with isReadableFile
* WIP - compact block processor + start stop notification tests
* Mock service to test smaller ranges on BlockProcessor
* Improvements to ZcashOperation and tests
* ZcashOperation own file. CompactBlockProcessor fixes + tests
* Block Processor. Batch processing first 1000 blocks
* Download-Validate-Scan sequence of compact block processor
40a1f57274