Rename README to README.md

This way it can be properly formatted when displayed by GitHub's web
interface.
new tests for regions + multicolumn
Added CSS3 Transforms testcases.
rotateX/Y/Z
transform-style
2 script case
Add test for css3 transforms: rotateY.
Updated the info about testcases.
Merge remote-tracking branch 'upstream/master'
Created a break-before: column test and its reftest.
Added image flag (was missing).
Modified the TCs for CSS Trasnforms.

Fixed the problems.
Modified the help link.
Add test for display: grid.
Add test for display: inline-grid.
I approved the modifications Arron Eicholz made to
the following resubmitted tests for review in /backgrounds/:
background-063, 068, 070, 071, 075, 076, 080, 082,
083 and 085.
I modified accordingly the tests
background-061 and background-073 since it is obvious
Arron Eicholz would have done the same modifications
in those tests too.
Add test for fr unit.
Add test for combined use of fr unit and percentage.
Add a quirks mode version of /approved/css-style-attr/src/style-attr-braces-002.xht . Also see https://bugzilla.mozilla.org/show_bug.cgi?id=915053
Add tests for properties of css3 grid layout.
remove .DS_Store file
minor change to id name to be consistent with the rest
changed assertion per mihai's feedback