snappier opening to About page

+people going to the polls to begin.
-removed "crossing the floor" and "divisions" (too early for this info?), and reference to media coverage vs actual behavior. Maybe a reference to Clive Palmer goes here :-)
There's a switch from "we" to "you" which needs fixing...
added missing space
Merge pull request #528 from openaustralia/about_changes2

Wording updates to the about page