Change HTML email link to hide token

closes #3305
- Hide token in HTML email

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As suggested in #3305 this changes the HTML to show a text instead of the reset token. The text version now looks like: 
![screen shot 2014-09-20 at 13 04 30](https://cloud.githubusercontent.com/assets/176576/4345122/6f34aee8-40b7-11e4-9f39-55a6d090aa77.png)

This is a result of the `html-to-text` module and its link handling. /cc @JohnONolan