Move the kickstart help outside the button.

Make kickstart button a secondary action.
Set popover help placement to bottom, so popover does not hide the kickstart button.

These actions make the interface cleaner, with only one primary action.

It fixes #131 and is related with #123.

![frespo_kickstart_popover](https://f.cloud.github.com/assets/105852/84571/7d9c9bbc-6418-11e2-9db0-bb9753da2250.png)

![frespo_kickstart_popover_open](https://f.cloud.github.com/assets/105852/84573/ac8d1a6e-6418-11e2-9c9b-1f5cd15cfb53.png)