added tests for #101 (phantomjs 1.8 only)

+/*jshint strict:false*/
+/*global CasperError casper console phantom require*/
+if (phantom.version.major === 1 && phantom.version.minor < 8) {
+    // https://github.com/n1k0/casperjs/issues/101
+    casper.warn('document.location is broken under phantomjs < 1.8');
+    casper.test.done();
+} else {
+    casper.start('tests/site/index.html', function() {
+        this.evaluate(function() {
+            document.location = '/tests/site/form.html';
+        });
+    });
+
+    casper.then(function() {
+        this.test.assertUrlMatches(/form\.html$/);
+    });
+
+    casper.run(function() {
+        this.test.done();
+    });
+}