update integration tests
add block height to level DB
rm tdb dependency from Block DB
rm tdb dependency from Block DB2
refactor tdb and bdb
add cache for balance and utxo
0.2.1
refactor in Transaction db
Merge pull request #85 from matiu/feature/optimizations

 Feature/optimizations -- great jobs!
Fix sync process by @matiu
Merge pull request #88 from cmgustavo/bug/01-sync

Fix sync process by @matiu
add report when starting insight
add report when starting insight2
banner
add WARN is db version is old
add more warning on startup
Merge pull request #89 from matiu/feature/scripts

Feature/scripts
Fixed round value of latest transaction list (home)
Merge pull request #90 from cmgustavo/bug/01-last-tx-value

Fixed round value of latest transaction list (home)