Very lightweight bidi support by dir="auto", couldn't be done with CSS

I just tested it from browser inspector. It's idea is very simple:
Before:
![2013-07-19 13_48_10-go read](https://f.cloud.github.com/assets/833473/824857/472230a6-f054-11e2-874c-6a5c1e7e807b.png)
After:
![2013-07-19 13_48_53-go read](https://f.cloud.github.com/assets/833473/824859/502c067c-f054-11e2-97ca-64bcc7aa284d.png)
By this simple solution goread will support RTL (Persian/Arabic, Hebrew, ...) languages.
Alternative solution can be done like this https://github.com/Athou/commafeed/commit/9568ccfeacc411b8565bee8bc26b2296825fdb4a but https://code.google.com/p/google-web-toolkit/source/browse/trunk/user/src/com/google/gwt/i18n/shared/BidiUtils.java must ported for it so I think for now, this would be enough