fix #1041 update spinx-rtd scheme

[ltalirz]

This fixes an issue with line numbers not being displayed correctly.
(worked in docs created locally, but still broken on the web: Example: Search for "Here is the code:" on http://aiida-core.readthedocs.io/en/latest/work/index.html )

• update sphinx rtd theme also for read-the-docs documentation
• update python script for updating reqs

[sphuber]

Thanks Leopold for looking at this. Since the previous PR that addressed this issue was merged into release_v0.11.0 could you please rebase your branch on release_v0.11.1. That way it will be fixed in the next patch release

[sphuber]

Please rebase on release_v0.11.1 branch

[ltalirz]

@sphuber The reason this was branched off develop is that the documentation on RTD is built from develop. http://aiida-core.readthedocs.io/en/latest/
That's correct isn't it?

[sphuber]

Yes I guess that's true, but the release branch will be merged into develop once it is released. I am not sure if it is nice to also have it fixed in the release branch already. If not then I guess we can just merge into develop straight away

[ltalirz]

Well, the only point where this shows up is on RTD and I would rather have the 'latest' docs (which everyone reads) fixed now than the 0.11.1 + latest docs fixed whenever 0.11.1 is released.