update version string builder to be semver compliant

Merge pull request #15 from Alethio/batch-calls-receipts

update lite explorer config

update web3-go version and take advantage of batch calls

don't expose the postgres port by default

rollback the transactions if it triggers any error

Merge pull request #11 from Alethio/database-connections-fix

try to fix database connections

Merge pull request #9 from Alethio/fix-http-polling

Fix for issue #8. Configuration option not passed correctly to http polling.

fix small issue leading to reorged blocks not being properly detected

Update readme: docs moved to gitbook.

Merge pull request #6 from Alethio/lite-explorer-docker-compose

update reamde

update reamde