Tighten up vertical spacing between left panels

1. Look at spacing between left nav, sponsors, watch curriki grow.
2. Look at style guide

Bug:
Althought the style guide does not specify a spacing, can you pull it in by a few pixels.

I added a comment to the style guide asking for a specific number, but please try something on your own.

Style Guide: http://www.curriki.org/xwiki/bin/view/Project/+Summary