shared icons for all apps moved to ui/common
new logo on login page
Merge branch 'master' of https://github.com/cloudsidekick/cato
Fixes #262 - removed cato mascot from 'home' page
Merge branch 'enhancement/262'
Closes #315 - removed action icons
Closes #316 - removed unused icons
#317 - moved task command icons to subdirectory (better organized)
#317 - finished organizing extension icons