Add "Common issues"

[loelsonk]

Hi Lee,

since I've upgraded reacql to v 3.0.0 I am having problems installing node-sass on my windows machine. There is an issue with permissions. Installing with admin privileges does help.

but running npm rebuild node-sass helps.

This problem is well described on node-sass github.

I thought I'd be nice to have "Common issues" section/page in the docs. It will save a lot of time for newcomers.

[leebenson]

Great idea @loelsonk, I like it. Consider it on the to-do.