Implement recursive field lookup in compat mode

Provides the mustache behavior of recursive lookup without the use of depthed paths.

Note that this does incur a fairly dramatic performance penalty for depthed queries.

spec/blocks.js

@@ -94,4 +94,25 @@ describe('blocks', function() {
         'No people\n');
     });
   });
+
+  describe('compat mode', function() {
+    it("block with deep recursive lookup lookup", function() {
+      var string = "{{#outer}}Goodbye {{#inner}}cruel {{omg}}{{/inner}}{{/outer}}";
+      var hash = {omg: "OMG!", outer: [{ inner: [{ text: "goodbye" }] }] };
+
+      shouldCompileTo(string, [hash, undefined, undefined, true], "Goodbye cruel OMG!");
+    });
+    it("block with deep recursive pathed lookup", function() {
+      var string = "{{#outer}}Goodbye {{#inner}}cruel {{omg.yes}}{{/inner}}{{/outer}}";
+      var hash = {omg: {yes: "OMG!"}, outer: [{ inner: [{ yes: 'no', text: "goodbye" }] }] };
+
+      shouldCompileTo(string, [hash, undefined, undefined, true], "Goodbye cruel OMG!");
+    });
+    it("block with missed recursive lookup", function() {
+      var string = "{{#outer}}Goodbye {{#inner}}cruel {{omg.yes}}{{/inner}}{{/outer}}";
+      var hash = {omg: {no: "OMG!"}, outer: [{ inner: [{ yes: 'no', text: "goodbye" }] }] };
+
+      shouldCompileTo(string, [hash, undefined, undefined, true], "Goodbye cruel ");
+    });
+  });
 });

spec/env/common.js

@@ -17,7 +17,7 @@ global.compileWithPartials = function(string, hashOrArray, partials) {
   if(Object.prototype.toString.call(hashOrArray) === "[object Array]") {
     ary = [];
     ary.push(hashOrArray[0]);
-    ary.push({ helpers: hashOrArray[1], partials: hashOrArray[2], compat: hashOrArray[3] });
+    ary.push({ helpers: hashOrArray[1], partials: hashOrArray[2] });
     options = {compat: hashOrArray[3]};
   } else {
     ary = [hashOrArray];