Support additional data types

[alexrudd2]

• Input Point (X)
• Output Point (Y)
• Control Relay (C)
• Timer (T) - Parse Timer datatypes numat/clickplc#21
• Counter (CT)
• System Control Bit (SC)
• Data Registers
  • DS
  • DD
  • DH
  • DF
• Input Register (XD)
• Output Register (YD)
• Timer Register (TD)
• Counter Register (CTD)
• System Data Register (SD) - Parse SD (system data) datatype numat/clickplc#13
• Text (TXT) - https://github.com/numat/clickplc/issues/100