[STYLE] Center align and make narrow (255px) ripple inputs.
[STYLE] Remove inline styles from ripple form.
[FEATURE] Add ripple withdraw button to menu. Remove github option.
[STYLE] Add clear:both to center-mobile class.
[FEATURE] Update the buttons text for twitter and ripple withdraw
[FEATURE] Sort out bitcoin bridge routes, update controller actions.
[FEATURE] Add page, form, and js for ripple-to-bitcoin bridge page.