bump version to 0.9.3
bump version to 0.9.3

this release fixes an issue with the view guard providing enough arguments for
the view_guard lambda. How guards are called has been rewritten and is likely
to continue to change.

vkill/switch_user,gregmolnar/switch_user,mitsuru/switch_user,vkill/switch_user,flyerhzm/switch_user,MustWin/switch_user,mitsuru/switch_user,cyanna/switch_user,MustWin/switch_user,flyerhzm/switch_user,cyanna/switch_user