gnome: remove hamster-applet

Obsoleted by hamster-time-tracker long ago
gnome: update alternative status menu package name

gnome-shell-extension-alt-status-menu became gnome-shell-extension-alternative-status-menu

(this is pulled in by a Recommends in gnome-shell anyway)
gnome: gcalctool is now gnome-calculator
Merge pull request #29 from Catanzaro/master

keep up with changing package names