Add a makefile to easily run tests and optimise images

Signed-off-by: Francois Marier <francois@catalyst.net.nz>

Makefile

+all:
+	@echo "Run 'make imageoptim' to losslessly optimise all images"
+	@echo "Run 'make minaccept' to run the quick pre-commit tests"
+	@echo "Run 'make push' to push your changes to the repo"
+
+imageoptim:
+	find . -iname '*.png' -exec optipng -o7 -q {} \;
+	find . -iname '*.gif' -exec gifsicle -O2 -b {} \;
+	find . -iname '*.jpg' -exec jpegoptim -q -p --strip-all {} \;
+	find . -iname '*.jpeg' -exec jpegoptim -q -p --strip-all {} \;
+
+minaccept:
+	@find htdocs/ -type f -name "*.php" | xargs -n 1 -P 2 php -l > /dev/null
+
+push: minaccept
+	git push