Upgrading from 3.2.1 to 4

New default syntax

• icon-* -> fa fa-* (NOTE: fa base class is only needed by icons)
• icon-fixed-width -> fa-fw
• icon-large -> fa-lg
• icons-ul -> fa-ul

New icon names

• ban-circle -> ban
• bar-chart -> bar-chart-o
• beaker -> flask
• bell -> bell-o
• bell-alt -> bell
• bitbucket-sign -> bitbucket-square
• bookmark-empty -> bookmark-o
• calendar-empty -> calendar-o
• check -> check-square-o
• check-empty -> square-o
• check-minus -> minus-square-o
• check-sign -> check-square
• chevron-sign-down -> chevron-circle-down
• chevron-sign-left -> chevron-circle-left
• chevron-sign-right -> chevron-circle-right
• chevron-sign-up -> chevron-circle-up
• circle-arrow-down -> arrow-circle-down
• circle-arrow-left -> arrow-circle-left
• circle-arrow-right -> arrow-circle-right
• circle-arrow-up -> arrow-circle-up
• circle-blank -> circle-o
• collapse -> caret-square-o-down
• collapse-alt -> collapse-o
• collapse-top -> caret-square-o-up
• comment-alt -> comment-o
• comments-alt -> comments-o
• copy -> files-o
• cut -> scissors
• dashboard -> tachometer
• double-angle-down -> angle-double-down
• double-angle-left -> angle-double-left
• double-angle-right -> angle-double-right
• double-angle-up -> angle-double-up
• download -> arrow-circle-o-down
• download-alt -> download
• edit -> pencil-square-o
• edit-sign -> pencil-square
• envelope-alt -> envelope-o
• exclamation-sign -> exclamation-circle
• expand -> caret-square-o-right
• expand-alt -> expand-o
• external-link-sign -> external-link-square
• eye-close -> eye-slash
• eye-open -> eye
• facebook-sign -> facebook-square
• facetime-video -> video-camera
• file-alt -> file-o
• file-text-alt -> file-text-o
• flag-alt -> flag-o
• folder-close -> folder
• folder-close-alt -> folder-o
• folder-open-alt -> folder-open-o
• food -> cutlery
• frown -> frown-o
• github-sign -> github-square
• google-plus-sign -> google-plus-square
• hand-down -> hand-o-down
• hand-left -> hand-o-left
• hand-right -> hand-o-right
• hand-up -> hand-o-up
• hdd -> hdd-o (4.0.1)
• heart-empty -> heart-o
• h-sign -> h-square
• indent-left -> outdent
• indent-right -> indent
• info-sign -> info-circle
• keyboard -> keyboard-o
• legal -> gavel
• lemon -> lemon-o
• lightbulb -> lightbulb-o
• linkedin-sign -> linkedin-square
• meh -> meh-o
• microphone-off -> microphone-slash
• minus-sign -> minus-circle
• minus-sign-alt -> minus-square
• mobile-phone -> mobile
• moon -> moon-o
• off -> power-off
• ok -> check
• ok-circle -> check-circle-o
• ok-sign -> check-circle
• paper-clip -> paperclip
• paste -> clipboard
• phone-sign -> phone-square
• picture -> picture-o
• pinterest-sign -> pinterest-square
• play-circle -> play-circle-o
• play-sign -> play-circle
• plus-sign -> plus-circle
• plus-sign-alt -> plus-square
• pushpin -> thumb-tack
• question-sign -> question-circle
• remove -> times
• remove-circle -> times-circle-o
• remove-sign -> times-circle
• rss-sign -> rss-square
• save -> floppy-o
• screenshot -> crosshairs
• share -> share-square-o
• share-alt -> share
• share-sign -> share-square
• sign-blank -> square
• signin -> sign-in
• signout -> sign-out
• smile -> smile-o
• sort-by-alphabet -> sort-alpha-asc
• sort-by-alphabet-alt -> sort-alpha-desc
• sort-by-attributes -> sort-amount-asc
• sort-by-attributes-alt -> sort-amount-desc
• sort-by-order -> sort-numeric-asc
• sort-by-order-alt -> sort-numeric-desc
• sort-down -> sort-asc
• sort-up -> sort-desc
• star-empty -> star-o
• star-half-empty -> star-half-o
• sun -> sun-o
• thumbs-down-alt -> thumbs-o-down
• thumbs-up-alt -> thumbs-o-up
• time -> clock-o
• trash -> trash-o
• tumblr-sign -> tumblr-square
• twitter-sign -> twitter-square
• unchecked -> square-o
• unlink -> chain-broken
• unlock-alt -> unlock-o
• upload -> arrow-circle-o-up
• upload-alt -> upload
• warning-sign -> exclamation-triangle
• xing-sign -> xing-square
• youtube-sign -> youtube-square
• zoom-in -> search-plus
• zoom-out -> search-minus