use speedcrunch instead of xcalc

keys

@@ -1,6 +1,6 @@
 # Application shortcuts
 Mod4 a :Exec /home/josh/bin/terminal-emulator
-Mod4 c :Exec xcalc
+Mod4 c :Exec speedcrunch
 Mod4 g :Exec /usr/bin/gvim
 Mod1 F2 :Exec fbrun
 Mod4 r :Exec fbrun