v2.1.3... version bump

i bumped the version number from 2.1.2beta to 2.1.3... mainly because i think

-the bugs are gone,
-the changes introduced are quite "significant enough"
-the 2.1.2 version is "notorius" for the weird IE quirk, so i abandoned that version number.
-i want a new number, and i see that the time is right.

so enjoy 2.1.3!!!