Support for inline tags

This syntax [appeared](https://github.com/visionmedia/jade/pull/1323) in Jade 1.0 and is very handy actually.
```jade
div [a(href="#") link]
```

Had to change html regexps a bit, because the ending one had a condition that never worked as it required extra > symbol at the end of the html code like `</div>>` for to make it actually end before the line ending. And that broke inline tags that followed embedded html code.

Here's how it looks
![screenshot 2013-12-29 06 00 10](https://f.cloud.github.com/assets/1244342/1818864/b89c24bc-703d-11e3-9dac-d7fc0a6dd722.png)

PS. I've also copied some stuff that you updated in Jade language grammar to PyJade like **regexps** and **interpolated_error**. Not sure if anyone uses though :)