Added script to compile SDL2 on raspi

Scripts/Raspi/install_sdl2_rpi.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+
+# --------------------------------------------------------
+# Installs SDL2 from source on the Raspberry Pi (Raspbian)
+#
+# Run from the web:
+#   bash <(curl -s raw_script_url_here)
+# --------------------------------------------------------
+
+bold="\033[1m"
+normal="\033[0m"
+
+# Welcome message
+echo -e "\n${bold}This will install SDL2 from source."
+echo -e "It will take about an hour to compile on the Raspberry Pi.${normal}"
+
+# Prompt to continue
+read -p "  Continue? (y/n) " ans
+if [[ $ans != "y" ]]; then
+  echo -e "\nQuitting...\n"
+  exit
+fi
+echo
+
+# Time the install process
+START_TIME=$SECONDS
+
+# Setting up SDL2 variables
+url="http://www.libsdl.org"
+
+sdl="SDL2-2.0.3"
+sdl_url="${url}/release/${sdl}.tar.gz"
+
+image="SDL2_image-2.0.0"
+image_url="${url}/projects/SDL_image/release/${image}.tar.gz"
+
+mixer="SDL2_mixer-2.0.0"
+mixer_url="${url}/projects/SDL_mixer/release/${mixer}.tar.gz"
+
+ttf="SDL2_ttf-2.0.12"
+ttf_url="${url}/projects/SDL_ttf/release/${ttf}.tar.gz"
+
+get () {
+  cd /tmp
+  wget -N $1
+  tar -xzf $2.tar.gz
+  cd $2
+  ./configure && make && sudo make install
+  rm /tmp/$2.tar.gz
+  rm -rf /tmp/$2
+}
+
+get ${sdl_url} ${sdl}
+get ${image_url} ${image}
+get ${mixer_url} ${mixer}
+
+sudo apt-get install -y libfreetype6-dev libudev-dev libasound2-dev libdbus-1-dev libvorbis-dev libmpeg3-dev 
+get ${ttf_url} ${ttf}
+
+# Print the time elapsed
+ELAPSED_TIME=$(($SECONDS - $START_TIME))
+echo -e "\n${bold}Finished in $(($ELAPSED_TIME/60/60)) hr, $(($ELAPSED_TIME/60%60)) min, and $(($ELAPSED_TIME%60)) sec${normal}\n"