add syntax color to README

Author: sourceperl

README.rst

@@ -28,21 +28,21 @@ You can install this package from:
 
 PyPI, the easy way:
 
-::
+.. code-block:: bash
 
     sudo pip install pyModbusTCP
 
 GitHub:
 
-::
+.. code-block:: bash
 
     git clone https://github.com/sourceperl/pyModbusTCP.git
     cd pyModbusTCP
     sudo python setup.py install
 
 GitHub with pip:
 
-::
+.. code-block:: bash
 
     sudo pip install git+https://github.com/sourceperl/pyModbusTCP.git
 
@@ -54,30 +54,30 @@ See examples/ for full scripts.
 include (for all samples)
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 
-::
+.. code-block:: python
 
     from pyModbusTCP.client import ModbusClient
 
 module init (TCP always open)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-::
+.. code-block:: python
 
     # TCP auto connect on first modbus request
     c = ModbusClient(host="localhost", port=502, unit_id=1, auto_open=True)
 
 module init (TCP open/close for each request)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-::
+.. code-block:: python
 
     # TCP auto connect on modbus request, close after it
     c = ModbusClient(host="127.0.0.1", auto_open=True, auto_close=True)
 
 module init (with accessor functions)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-::
+.. code-block:: python
 
     c = ModbusClient()
     c.host("localhost")
@@ -89,7 +89,7 @@ module init (with accessor functions)
 Read 2x 16 bits registers at modbus address 0 :
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-::
+.. code-block:: python
 
     regs = c.read_holding_registers(0, 2)
     if regs:
@@ -100,7 +100,7 @@ Read 2x 16 bits registers at modbus address 0 :
 Write value 44 and 55 to registers at modbus address 10 :
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-::
+.. code-block:: python
 
     if c.write_multiple_registers(10, [44,55]):
         print("write ok")
@@ -120,13 +120,13 @@ On windows OS with older Python version (<3), win_inet_pton module is require. T
 
 install win_inet_pton:
 
-::
+.. code-block:: bash
 
     sudo pip install win_inet_pton
 
 import win_inet_pton at beginning of your code:
 
-::
+.. code-block:: python
 
     import win_inet_pton
     from pyModbusTCP.client import ModbusClient