Remove 'policy vote' terminology

Replace 'policy vote' with language that doesn't treat the policy like a person, who has votes.
test update for previous commit d6708fa2
In votes summary table don't show zeroes. Makes table easier to read
fix typo in table markup
Remove code that should no longer be called
Remove unused variables
sort no longer supported for Division#show. So, redirect
Remove use of sort because of earlier redirects
Move redirect to its own action
make sure house is always set on showing a division
create link "button" version of nav_link
change divisions house nav from select to button group

closes #422
Merge pull request #444 from openaustralia/remove_house_select

Change 'house' select-list navigation to a button group pattern on divsion#index
Simplify divisions#index intro copy
Remove unused variable
Merge branch 'test' into change_policy_vote_language

Conflicts:
	app/views/policies/_vote_summary_table.html.haml
	spec/fixtures/static_pages/mp.php?mpn=Christine_Milne&mpc=Tasmania&house=senate&dmp=1.html
	spec/fixtures/static_pages/mp.php?mpn=Kevin_Rudd&mpc=Griffith&house=representatives&dmp=1.html
	spec/fixtures/static_pages/mp.php?mpn=Tony_Abbott&mpc=Warringah&house=representatives&dmp=1.html
	spec/fixtures/static_pages/policies/1.html
	spec/fixtures/static_pages/policies/2.html
	spec/fixtures/static_pages/policies/2_2.html
	spec/fixtures/static_pages/policies/2_3.html
	spec/fixtures/static_pages/policy.php?id=1.html
	spec/fixtures/static_pages/policy.php?id=2.html
simplify "Supporter would have voted" to "Supporters vote"
remove the colon pattern on ‘supporters vote’

changes 'supporters vote: Aye' to 'supporters vote “Aye”'
Tests for last commit 10cbb648
simplify divisions intro copy further.