Shuffle files around in /docs

docs/implementation-notes/code_style.rst

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+Basically, PEP8
+
+- Max line width: 80 chars.
+- Use camel case for class and type names
+- Use underscores for functions and variables.
+- Use double quotes.
+- Use parentheses instead of '\' for line continuation where ever possible (which is pretty much everywhere)
+- There should be max a single new line between:
+    - statements
+    - functions in a class
+- There should be two new lines between:
+    - definitions in a module (e.g., between different classes)
+- There should be spaces where spaces should be and not where there shouldn't be:
+    - a single space after a comma
+    - a single space before and after for '=' when used as assignment
+    - no spaces before and after for '=' for default values and keyword arguments.
+
+Comments should follow the google code style. This is so that we can generate documentation with sphinx (http://sphinxcontrib-napoleon.readthedocs.org/en/latest/)