Causes ggs-wrapper to take full css selector instead of class name

Closes #4
Defaults to having both top and bottom margin of one line

Closes #5
Adds upgrading note to README
Merge branch 'one-point-oh'

* one-point-oh:
  Adds upgrading note to README
  Defaults to having both top and bottom margin of one line
  Causes ggs-wrapper to take full css selector instead of class name