Save auto-generated font metrics data to separate JSON file

This separates auto-generated code from manually created code.
We need a more recent version of browserify to directly require JSON.
Note that the data was copied, not recreated, so it has not been changed.
This addresses issue #301.

Makefile

@@ -83,7 +83,7 @@ PERL=perl
 PYTHON=$(shell python2 --version >/dev/null 2>&1 && echo python2 || echo python)
 
 metrics:
-	cd metrics && $(PERL) ./mapping.pl | $(PYTHON) ./extract_tfms.py | $(PYTHON) ./extract_ttfs.py | $(PYTHON) ./replace_line.py
+	cd metrics && $(PERL) ./mapping.pl | $(PYTHON) ./extract_tfms.py | $(PYTHON) ./extract_ttfs.py > ../src/fontMetricsData.json
 
 clean:
 	rm -rf build/*

metrics/README.md

@@ -17,5 +17,5 @@ Once you have these things, run
 
     make metrics
 
-which should generate new metrics and place them into `fontMetrics.js`. You're
-done!
+which should generate new metrics and place them into `fontMetricsData.json`.
+You're done!

metrics/replace_line.py

@@ -1,17 +0,0 @@
-#!/usr/bin/env python2
-
-import sys
-
-with open("../src/fontMetrics.js", "r") as metrics:
-    old_lines = file.readlines(metrics)
-
-replace = sys.stdin.read()
-
-with open("../src/fontMetrics.js", "w") as output:
-    for line in old_lines:
-        if line.startswith("var metricMap"):
-            output.write("var metricMap = ")
-            output.write(replace)
-            output.write(";\n")
-        else:
-            output.write(line)

package.json

@@ -14,7 +14,7 @@
   ],
   "license": "MIT",
   "devDependencies": {
-    "browserify": "~2.29.1",
+    "browserify": "^10.2.4",
     "clean-css": "~2.2.15",
     "express": "~3.3.3",
     "jasmine-node": "2.0.0-beta4",