Improve build process

Summary:
Improve the build process by combining the CSS files, automatically
selecting font files to include, and building .tar.gz and .zip files.

Test Plan:
 - Make sure tests work
 - Make sure huxley screenshots didn't change
 - Make sure zip and tar.gz files contain only files we want to distribute

Reviewers: alpert

Reviewed By: alpert

Differential Revision: http://phabricator.khanacademy.org/D13159

Makefile

@@ -1,5 +1,5 @@
-.PHONY: build setup copy serve clean metrics test
-build: setup build/katex.min.js build/katex.min.css compress
+.PHONY: build setup copy serve clean metrics test zip
+build: setup build/katex.min.js build/katex.min.css zip compress
 
 setup:
 	npm install
@@ -13,9 +13,33 @@ build/katex.min.js: build/katex.js
 build/katex.less.css: static/katex.less
 	./node_modules/.bin/lessc $< > $@
 
-build/katex.min.css: build/katex.less.css
+build/katex.css: build/katex.less.css static/fonts.css
+	cat $^ > $@
+
+build/katex.min.css: build/katex.css
 	./node_modules/.bin/cleancss -o $@ $<
 
+.PHONY: build/fonts
+build/fonts:
+	rm -rf $@
+	mkdir $@
+	for font in $(shell grep "font" static/katex.less | grep -o "KaTeX_\w\+" | cut -d" " -f 2 | sort | uniq); do \
+		cp static/fonts/$$font* $@; \
+	done
+
+.PHONY: build/katex
+build/katex: build/katex.min.js build/katex.min.css build/fonts
+	mkdir -p build/katex
+	cp -r $^ build/katex
+
+build/katex.tar.gz: build/katex
+	cd build && tar czf katex.tar.gz katex/
+
+build/katex.zip: build/katex
+	cd build && zip -rq katex.zip katex/
+
+zip: build/katex.tar.gz build/katex.zip
+
 compress: build/katex.min.js build/katex.min.css
 	@$(eval JSSIZE!=gzip -c build/katex.min.js | wc -c)
 	@$(eval CSSSIZE!=gzip -c build/katex.min.css | wc -c)