fix(css) fix plugin issue in IE where only the last stylesheet is applied when multiple sheets are fetched
fix(css) rework plugin fix to set useCssText after style type set to make IE8 happy
fix(executor) try deleting the window prop in removeGlobalObject and catch for an IE8 alternative
fix(travis) put node_js version in quotes to address travis build error
Merge pull request #307 from gvsboy/master

fix (Plugins): supports maximum selector rules in CSS generation
This fixes a bug where it was possible to write to the wrong property in IE. It also updates the travis files.

Fixes #307