Update impact-bubble styles for consistency.
Update the tsunami warning to match the increased size of the other impat bubbles.
Delete the old tsunami impact bubble image.
Set font-size to 0. This removes excess padding that can be seen on hover effect.
Merge pull request #12 from ehunter-usgs/impact-bubbles

Impact bubbles
Update hypocenter, moment-tensor, and focal-mechanism pages to use a summary page instead of tabs.
Update test to match new class names.
Merge branch 'master' into moment-tensor-summary