Fixes to upgrade costs, general UI improvements

After running the test.js code on your latest commit of 6dc8e72f3b755881a69ad3ea68bb13353a0b5209, it is shown that after some amount of upgrades purchased, the price will be cheaper than the previous tier. Also in the tests were showing that the information tab will always flash once there is a single piece of information displayed. The initial results of the tests are below.
![fail tests](https://cloud.githubusercontent.com/assets/1001300/3477447/438d72aa-031a-11e4-99b2-9a78c099666e.jpg)

The changes I made in these commits fixed these issues. Things also fixed were vague terms on upgrades text, some upgrades not having a cursor icon, and I also added more information on the stats page.

Below is the tests run on my latest commit.
![pass tests](https://cloud.githubusercontent.com/assets/1001300/3477466/c7ff9cac-031a-11e4-86c7-fb5f3b4605ae.jpg)