Array(T) performance improvement ClickHouse#2

fix tests

Merge pull request ClickHouse#107 from agaurav/master

Mention batch inserts as key feature in README

Merge pull request ClickHouse#98 from jeehoonkim/master

adding support for signed integer write functions fixes ClickHouse#97

ClickHouse#89 ClickHouse#93 rollback: reset block buffers and close c…

…onnection

fix: recive block without rows

TLS support

Merge pull request ClickHouse#70 from AlekSi/array-bug

Expose a bug in 1.2.2

Merge pull request ClickHouse#66 from vavrusa/master

fixed an off by one error

ClickHouse#64 add missing support of driver.Valuer interface