Adding alerts

I don't know if these are syntactically correct or even what we want from the alerts, but this scheme will let us address the different situations I foresee.
Reformatting the alerts a bit and unifying logins.
Fixing runtime errors and message box height.
Merge branch 'master' into add_more_actions
Removed greeting function as it was redundant, really.
Merge branch 'add_more_actions'

This branch merges Ken's suggestions for the new actions he'd like to
see. I also touched the code up a bit.