Made minor HTML-CSS changes on /people/ results page.

I've made some minor HTML/CSS changes on the /people/ search results page:
1. Centered the results box. 
2. increased the width of results box so that each person's info fits into 1 line.
3. added <ul> bullet points in between each person's info

BEFORE:
![before_search](https://f.cloud.github.com/assets/954858/2059889/e6cb18dc-8be2-11e3-9232-39c98409c3e9.png)

AFTER:
![minor_css_fixes_people_search](https://f.cloud.github.com/assets/954858/2059890/edc0d9e2-8be2-11e3-82aa-9bf9eec67d9f.png)