Adding support for building docs on ReadTheDocs

Adding support for building docs on ReadTheDocs

rtds requirements

trying conda env on rtds

typo in env file

trying to install recent sphinx

installing rtds deps

installing rtds deps

channel priority

reverting channel priority

cleaning up

fractions.gcd() function has been removed from Python 3.9, it was
deprecated since Python 3.5.

https://docs.python.org/3.9/whatsnew/3.9.html#removed

See https://github.com/Theano/Theano/pull/6664#issuecomment-581845517

Closes #6734

use string_types instead of str in get_substream_rstates dtype assertion

Using Theano 1.0.4 via Keras 2.2.5 under Python 2.7.12, calling `keras.model.model_from_json()` for model deserialization fails at this assertion in theano at `get_substream_rstates` because `json.loads()` as called by Keras is returning a dict with unicode objects as values. This PR fixes the problem.

Fix deprecation warning.

Change the import of `Iterable` from `collections.Iterable` to `collections.abc.Iterable` to future-proof against Python 3.7.8.

Ignore new error that we didn't enforced before.

Fix pygment version. Its packages pkgs/main/noarch::pygments-2.4.2-py_0 get installed in Python 3.4, but it give an error that is doesnt support it.

Casting `diagonal_slice` to tuple eliminates a FutureWarning from numpy that could cause an error down the line.

added test for output shape of frac bilinear upsampling

Update the documentation on gpuarray.sched

Update the documentation on how to upload the package to PyPI

Fixed shape error of frac bilinear upsample

fixed bilinear_kernel_1D to return a float32 tensor

Be compatible with Numpy 1.16