v0.5.2

IMPROVEMENTS

• Added support of Tencent COS cloud object storage provider (thanks @kasnet)
• Added CLICKHOUSE_TIMEOUT and CLICKHOUSE_FREEZE_BY_PART options. It's useful when your tables have too many parts and default freezing doesn't work.
• Added 'rpm' and 'deb' packages to release page (thanks @Felixoid)

BUG FIXES

• Fixed connection issue when ClickHouse password contains special characters (#69)