Added release build script

Author: SlithyMatt

release.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+cd engine
+make
+cd ../sdk
+make clean
+rm -f xci_sdk_linux_amd64.tar.gz
+rm -f xci_sdk_windows_mingw64.zip
+make clean
+make
+tar -zcvf xci_sdk_linux_amd64.tar.gz xci.exe
+make clean
+make -f Makefile.mingw
+zip xci_sdk_windows_mingw64.zip xci.exe
+cd ..
+rm -f xci.zip
+zip xci.zip engine/XCI.PRG sdk/xci_sdk_linux_amd64.tar.gz sdk/xci_sdk_windows_mingw64.zip