enable IE8 to set html into style element

- Inspired of code suggested by @swhiteman, and spec based on
jsFiddle
http://jsfiddle.broadleafsystems.com/sLtph/7/
improvements after review
borderRadius getter, specs and consistency

- fix getter bugby behavior for borderRadius
(http://jsfiddle.net/rg4Yp/)
- make result consistent cross-browser
- add specs
simplify, optimize and fix punctuation

Also make this new spec not run if PhantomJS is version 1.x
improvement after review feedback
use indexOf('borderRadius') != -1 instead
move up ie9 check line
Merge pull request #2612 from SergioCrisostomo/2479-setHTML

enable IE8 to set html into style element
Merge pull request #2611 from SergioCrisostomo/fix-2545

borderRadius getter, specs and consistency
Fix svg element size

Fix svg size error in FF
Improve getSize to default to .getBoundingClientRect()
add bug info, add //<ltIE9> tags and renamed fn

Attending nice suggestions in the PR
improvements after review feedback