FIX: handle multiple paragraphs in email reply when parsing html

This PR fixes the rendering of email reply with multiple paragraphs. Example:

Email reply:

![email_reply](https://cloud.githubusercontent.com/assets/5732281/4560810/ec566b34-4ef7-11e4-92d2-c271caa8a641.png)

Without this change gets rendered as:

![without_pr](https://cloud.githubusercontent.com/assets/5732281/4560815/f374ac6e-4ef7-11e4-8c7b-cfb44ce26784.png)

With this change gets rendered as:

![reply_rendering](https://cloud.githubusercontent.com/assets/5732281/4560818/f71a5d78-4ef7-11e4-81b9-cf9556385ccd.png)