popover content, new logo, tidy up image files
destroy changed to delete but tests not updated

removes unwanted image files

edits modal header on new bills modal and footer on sign up

adds html to popovers

adds some styling to popover contents

adds text to all info buttons and styling

adds invoice heading to account view

info button text and new logo trials

adds updated logo design
Merge pull request #23 from ebanni/infopagesv2

popover content, new logo, tidy up image files