Split out the Extension docs into its own guide.
Review Request #7595 — Created Aug. 16, 2015 and submitted
The Extension documentation was getting complex, and didn't play well with Sphinx autodoc, due to the usage of sections. This change splits it out into a new Writing Extensions guide.
Built the docs and read through it. Links and formatting looked correct.
Tool: PEP8 Style Checker Processed Files: djblets/extensions/extension.py Ignored Files: docs/djblets/guides/extensions/writing-extensions.rst docs/djblets/guides/extensions/index.rst docs/djblets/guides/index.rst Tool: Pyflakes Processed Files: djblets/extensions/extension.py Ignored Files: docs/djblets/guides/extensions/writing-extensions.rst docs/djblets/guides/extensions/index.rst docs/djblets/guides/index.rst