Update keywords.txt and description

Author: sandeepmistry

README.adoc

@@ -2,7 +2,7 @@
 
 Use Modbus with your Arduino. 
 
-Using the RS485 shields, like the MKR 485 shield. This library depends on the ArduinoRS485 library.
+Using TCP or RS485 shields, like the MKR 485 Shield. This library depends on the ArduinoRS485 library.
 
 For more information about this library please visit us at
 http://www.arduino.cc/en/Reference/ArduinoModbus

keywords.txt

@@ -7,14 +7,45 @@
 #######################################
 
 ArduinoModbus	KEYWORD1
+ModbusRTUClient	KEYWORD1
+ModbusRTUServer	KEYWORD1
+ModbusRTUClient	KEYWORD1
+ModbusTCPServer	KEYWORD1
 
 #######################################
 # Methods and Functions (KEYWORD2)
 #######################################
 
 begin	KEYWORD2
+poll	KEYWORD2
 end	KEYWORD2
 
+setId	KEYWORD2
+readCoil	KEYWORD2
+readCoils	KEYWORD2
+readDiscreteInput	KEYWORD2
+readDiscreteInputs	KEYWORD2
+readHoldingRegister	KEYWORD2
+readHoldingRegisters	KEYWORD2
+readInputRegister	KEYWORD2
+readInputRegisters	KEYWORD2
+writeCoil	KEYWORD2
+writeCoils	KEYWORD2
+writeHoldingRegister	KEYWORD2
+writeHoldingRegisters	KEYWORD2
+maskWriteRegister	KEYWORD2
+writeAndReadRegisters	KEYWORD2
+lastError	KEYWORD2
+
+configureCoils	KEYWORD2
+configureDiscreteInputs	KEYWORD2
+configureHoldingRegisters	KEYWORD2
+configureInputRegisters	KEYWORD2
+writeDiscreteInput	KEYWORD2
+writeDiscreteInputs	KEYWORD2
+writeInputRegister	KEYWORD2
+writeInputRegisters	KEYWORD2
+
 #######################################
 # Constants (LITERAL1)
 #######################################

library.properties

@@ -3,7 +3,7 @@ version=1.0.0
 author=Arduino
 maintainer=Arduino <info@arduino.cc>
 sentence=Use Modbus equipment with your Arduino.
-paragraph=Using the RS485 shields, like the MKR 485 shield. This library depends on the RS485 library.
+paragraph=Using TCP or RS485 shields, like the MKR 485 Shield. This library depends on the ArduinoRS485 library.
 category=Communication
 url=http://www.arduino.cc/en/Reference/ArduinoModbus
 architectures=*