docs: Change "Micro Python" to "MicroPython" in all places in docs.

docs/contents.rst

@@ -1,5 +1,5 @@
 MicroPython documentation contents
-===================================
+==================================
 
 .. only:: port_pyboard
 

docs/index.rst

@@ -1,5 +1,5 @@
 MicroPython documentation and references
-=========================================
+========================================
 
 .. only:: port_pyboard
 

docs/library/index.rst

@@ -1,5 +1,5 @@
 MicroPython libraries
-======================
+=====================
 
 Functionality specific to the MicroPython implementation is available in
 the following library.

docs/library/micropython.rst

@@ -1,5 +1,5 @@
 :mod:`micropython` -- access and control MicroPython internals
-===============================================================
+==============================================================
 
 .. module:: micropython
    :synopsis: access and control MicroPython internals

docs/license.rst

@@ -1,5 +1,5 @@
 MicroPython license information
-================================
+===============================
 
 The MIT License (MIT)
 

docs/pyboard/tutorial/index.rst

@@ -1,7 +1,7 @@
 .. _tutorial-index:
 
 MicroPython tutorial
-=====================
+====================
 
 This tutorial is intended to get you started with your pyboard.
 All you need is a pyboard and a micro-USB cable to connect it to

docs/pyboard/tutorial/repl.rst

@@ -1,5 +1,5 @@
 Getting a MicroPython REPL prompt
-==================================
+=================================
 
 REPL stands for Read Evaluate Print Loop, and is the name given to the
 interactive MicroPython prompt that you can access on the pyboard.  Using