Raspi2png: update to modern pi-apps standard

apps/Raspi2png/install

@@ -6,14 +6,16 @@ function error {
   echo -e "\\e[91m$1\\e[39m"
   exit 1
 }
+
 "${DIRECTORY}/pkg-install" "libpng-dev" "$(dirname "$0")" || exit 1
 
+rm -rf ~/raspi2png
 git clone https://github.com/AndrewFromMelbourne/raspi2png || error "failed to clone repository!"
 
-cd raspi2png || error "failed to enter directory!"
+cd ~/raspi2png || error "failed to enter directory!"
 
 make || error "failed to compile!"
 sudo make install || error "sudo make install failed!"
 
-cd ..
+cd ~/
-rm -rf raspi2png || error "failed to delete directory!"
+rm -rf ~/raspi2png || error "failed to delete directory!"

apps/Raspi2png/installed-packages

@@ -1,3 +0,0 @@
-libpng12-dev
-libpng12-dev
-

apps/Raspi2png/uninstall

@@ -7,4 +7,4 @@ function error {
   exit 1
 }
 
-sudo rm /usr/bin/raspi2png
+sudo rm -f /usr/bin/raspi2png