Handle bidi levels and STT

Merge pull request #15 from semion1956/master

Add bidi levels attribute, update decor dependency to 0.6.x

0.2.0

Update decor dependency to 0.3.0.

0.1.1-dev

Various fixes, additions and improvements:
0.1.0-dev...0.1.1-dev

0.1.1-beta

Various changes:
0.1.0-dev...0.1.1-beta

Version 0.1.0-dev

First version published on bower.