Add return codes everywhere

steps/10-wipe.step

@@ -18,3 +18,4 @@ else
 		amf_return=1
 	fi
 fi
+return $amf_return

steps/20-partition.step

@@ -13,3 +13,4 @@ else
 	echo "~> Failed. :("
 	amf_return=1
 fi
+return $amf_return

steps/30-formatting.step

@@ -28,3 +28,4 @@ mkdir -p /mnt/boot
 mount ${blockdevice}1 /mnt/boot
 
 amf_return=0
+return $amf_return

steps/40-install.step

@@ -4,3 +4,4 @@ echo "~> Installing 'base' group and 'grub', 'efibootmgr'"
 pacstrap /mnt base grub efibootmgr
 
 amf_return=0
+return $amf_return

steps/50-configure.step

@@ -43,3 +43,4 @@ echo "~> Patching pacman.conf for some pacman magic."
 arch-chroot /mnt sed -i "s/\[options\]/\[options\]\nILoveCandy/g" /etc/pacman.conf
 
 amf_return=0
+return $amf_return