clarify install instructions

[williamFalcon]

It's not clear how to install for generation purposes. The instructions say: "all CLEVR requirements" but that doesn't really work because the CLEVR repo also doesn't have clear instructions.

Would be better to list in detail how to install or provide an install script.

[sjtuytc]

I thought you only need blender 2.79b and its dependencies (GLU etc).

[ishaanchandratreya]

What python version is required for this? I am getting a CPickle error so I'm assuming Python 2?

[rohitgirdhar]

Yes it was developed in python 2

[maskaravivek]

@rohitgirdhar I am also trying to set up the project locally and have installed the dependencies(singularity, blender) and have downloaded the spec_v0.img file.

Can you help me understand what path should DATA_MOUNT_POINT point to? I went through singularity docs but wasn't able to figure it out.