Added tool to compile to single header

INCLUDE/generate.sh

@@ -0,0 +1,8 @@
+# Build the include files
+echo Buildin the include files...
+echo ../Hazelnupp/*.cpp | sed 's/\.\.\/Hazelnupp\/main\.cpp//g' | xargs deggl -o Hazelnupp -i
+
+# Verify that they compile cleanly
+echo Verifying that they compile
+g++ Hazelnupp.cpp -c -Wall -Wextra -Wpedantic
+rm -f Hazelnupp.o