Use conf.py from ome-documentation in the sphinx-api conf.py
Fix .gitignore and add _build
Fix logic to display the release number in the API documentation
Replace OmeroPy by OMERO.py in the API doc
Do not inherit Sphinx extensions from common/conf.py
Use full omero.version rather than omero.shortversion for the API doc

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Create a separate page per module and control the toc depth

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Design api_theme to match documentation sphinx_theme

- Set the sidebar to the left
- Increase font sizes

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Backport changes from sphinx_theme
Merge pull request #2615 from sbesson/sphinx_api_improvements

Sphinx api improvements