Indicator Redesign

http://design.canonical.com/2012/04/status-menus/

Work items:
[mpt] Design an "About this Computer" dialog/window <https://wiki.ubuntu.com/AboutThisComputer>: DONE
[charlesk] Refactor indicator-session to be single menu: INPROGRESS
[mpt] Design a dialog for setting an alarm <https://wiki.ubuntu.com/TimeAndDate#alarm>: DONE
[mpt] Design IDO Calendar menu item <https://wiki.ubuntu.com/TimeAndDate#menu-calendar>: DONE
[larsu] Write IDO Calendar menu item: TODO
[charlesk] Switch launching Evolution to "default calendar app": TODO
[mpt] Design system settings options for adding calendars <https://wiki.ubuntu.com/TimeAndDate#subscriptions>: DONE
[larsu] Remove the generic application handling: DONE
[larsu] Make messaging menu hide when no applications are valid for use: DONE
[larsu] Make the telepathy message-status plugin detect configured accounts: TODO
[mpt] Define appearance of messaging menu when chat apps have different statuses <https://wiki.ubuntu.com/MessagingMenu#Title>: DONE
[jnick-tait] Icons for messaging menu IM status: INPROGRESS
[jnick-tait] Add icons to the theme for the sync menu states: TODO
[mpt] Specify the sync menu in detail <https://wiki.ubuntu.com/SyncMenu>: DONE
[charlesk] Determine sync API for application developers: TODO
[alecu] Review and comment sync API from Ubuntu One point of view: TODO
[charlesk] Build the sync indicator: TODO
[larsu] Funeral for indicator-printer: TODO
[larsu] Build temporary printing item on the Unity panel: TODO
[mpt] check that specs include accessible titles for indicators <https://wiki.ubuntu.com/MenuBar#system-status>: DONE
[larsu] test in orca: TODO