Implement PRG pattern on payments flow to prevent duplicate payments from form resubmission on confirmation page
Merge pull request #148 from Crowdtilt/prg_pattern_for_payment_duplication

Fix duplicate form submission from payments confirmation page
add ability for campaign admin to enter a contact phone number
Merge pull request #150 from Crowdtilt/add_phone_number

Add ability for campaign admin to enter a contact phone number
Merge remote-tracking branch 'upstream/master' into upbranch

Pulling in changes from Crowdtilt into Bootstrap 3 build
Nested columns for stats in backers section of campaign page, makes for a nice graceful collapse when scaled down.
Adding columns to checkout pages, moving from span for minimum to input placeholder text.
Making checkout process mobile friendly
Small fixes to checkout, added missing tooltip for Security Code
Making payment confirmation responsive.