Adding gflags to handle command line flags.

It sucks, but is the best there is without using boost.

third_party/gflags.gypi

@@ -0,0 +1,34 @@
+# Copyright 2013 Ben Vanik. All Rights Reserved.
+{
+  'targets': [
+    {
+      'target_name': 'gflags',
+      'type': 'static_library',
+
+      'direct_dependent_settings': {
+        'include_dirs': [
+          'gflags/src/',
+        ],
+      },
+
+      'include_dirs': [
+        'gflags/src/',
+      ],
+
+      'sources': [
+        'gflags/src/gflags.cc',
+        'gflags/src/gflags_completions.cc',
+        'gflags/src/gflags_nc.cc',
+        'gflags/src/gflags_reporting.cc',
+      ],
+
+      'conditions': [
+        ['OS == "win"', {
+          'sources!': [
+            'gflags/src/windows/port.cc',
+          ],
+        }],
+      ],
+    }
+  ]
+}