update Pure dependency to v0.4.2
Add update cssnormalize and cssgrids module.

These were created by running `grunt import-pure`
Merge pull request #1676 from tilomitra/pure-0.4.2

Update Pure dependency to 0.4.2
[docs] Remove remaining pieces of the "modules" page
Merge branch 'live-docs' into dev-master
Merge branch 'dev-master' into dev-3.x