Fix EZP-22604:  Add space separator between tag cloud's words

## Link ##
https://jira.ez.no/browse/EZP-22604
## Description ##
The goal here is to put space separator between words in the tag cloud block of the home page.

![tagg](https://cloud.githubusercontent.com/assets/5558661/2946010/33cea4b2-d9e7-11e3-8c09-77b1abd18ebd.png)