add auth and paged request to gh_api
attempt to cache gh_api requests

with requests-cache
raise AttributeError on missing attribute in ShimModule

required for sphinx build to succeed
updates to github stats

use authorized paged requests, etc.
start 1.0 whatsnew
add zero-import get_ipython example
Merge pull request #3704 from minrk/whatsnew

Start what's new for 1.0