Rename katex.process to katex.render

Test plan:
 - Make sure tests work and huxley tests didn't change

Auditors: alpert

katex.js

@@ -16,7 +16,7 @@ var utils = require("./utils");
  * Parse and build an expression, and place that expression in the DOM node
  * given.
  */
-var process = function(toParse, baseNode) {
+var render = function(toParse, baseNode) {
     utils.clearNode(baseNode);
 
     var tree = parseTree(toParse);
@@ -34,7 +34,7 @@ var renderToString = function(toParse) {
 };
 
 module.exports = {
-    process: process,
+    render: render,
     renderToString: renderToString,
     ParseError: ParseError
 };

static/main.js

@@ -27,7 +27,7 @@ function init() {
     reprocess();
 
     function reprocess() {
-        katex.process(input.value, math);
+        katex.render(input.value, math);
     }
 }
 

test/huxley/test.html

@@ -23,7 +23,7 @@
         query[split[0]] = decodeURIComponent(split[1]);
       }
       var mathNode = document.getElementById("math");
-      katex.process(query["m"], mathNode);
+      katex.render(query["m"], mathNode);
       document.getElementById("pre").innerHTML = query["pre"] || "";
       document.getElementById("post").innerHTML = query["post"] || "";
     </script>