OPC design: improve appearance of review step
OPC fixes: cart sidebar heading alignment fix
Replace font-weight bold with 700 for crispier text
OPC: Fix the issue of address getting saved causing duplicates

- Save address if a new one is entered
- Save address if an existing address is used and edited
- Do not save address if an existing address is used as is
Merge branch 'hitesh/features/general' into staging
OPC: Show loading screen instead of blank one on review step
OPC PayU: Proper placement of Iframe, fluidness, appropriate code changes

- Move iframe to a newly created form.phtml file for PayU
- Wrap payment method labels under conditionals and only show if enabled
- Fluid design to accomodate iframe into design
- Payment method does not reload again on payment page when changed
- Working orders for both PayU and MobiKwik
- Cleanup and testing pending
Merge branch 'staging' into hitesh/features/payu

Conflicts:
	skin/frontend/happy/default/css/happy_checkout.css