Thingsboard-gateway

Minor release with the following improvements.

**Main features:**
* [REST Connector] Added REST Connector to create your own endpoints and process the HTTP messages.

**Improvements:**
* [ODBC Connector] Improvements and tests.
* [CAN connector] Improvements and tests.
* [TB Utility] Installation improvements.

**Bug fixes:**
* [ODBC Connector] Fixes.
* [CAN Connector] Fixes.
* [TB Gateway Service] RPC command processing fixes.

Minor release with the following improvements.

**Improvements:**
* [OPC-UA Connector] Minor improvements

Minor release with the following improvements.

**Additional features:**
* [Auto-update notifier] Checking for new version is included in the gateway. If the new version will be available, you will know about it from logs.
* [RPC update request] To update your gateway just send RPC requests "gateway_update" and "gateway_restart" from TB to the gateway

**Improvements:**
* [MQTT Connector] Added ability to use JSON-Path Expressions as attribute/telemetry key. Found value will be used as a key on ThingsBoard.

**Bug fixes:**
* [Storage] Major fix in the storage.
* Some fixes.

Minor release with the following improvements.

**Main features:**
* [ODBC Connector] Added ODBC connector, to get information from different databases using ODBC drivers.

**Improvements:**
* [Modbus Connector] Refactored configuration file.

**Bug fixes:**
* [Modbus Connector] Attribute Updates and RPC calls bug fixes.

Minor release with the following improvements.

**Main features:**
* [BACnet Connector] Adding BACnet connector (Some basic services (analogValue, binaryValue, etc.
));

**Improvements:**
* [Modbus Connector] Added new fromat for Modbus RPC request;
* [TB Client] Imrovements for a re-connection to the ThingsBoard;

**Bug fixes:**

* [File Storage] Fix for 284 ;

Minor release with the following improvements.

**Improvements:**
* [Modbus Connector] Adding ability to use parameters from RPC instead of value from configuration 280;

**Bug fixes:**

* [TB sevice] Fix for installation 279;