Adding third party library hidapi

third_party/hidapi/hidapi.gyp

+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+  'targets': [
+    {
+      'target_name': 'hidapi',
+      'type': 'static_library',
+      'sources': [
+        'hidapi.h',
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          '.',
+        ],
+      },
+      'conditions': [
+        [ 'OS == "win"', {
+          'msvs_disabled_warnings': [ 4267 ],

[Will Harris, 2014/01/14 23:40:01]

is it not possible to fix these truncations?

+          'sources' : [ 'hidapi_win.c' ],
+        }],
+        [ 'OS == "mac"', {
+          'sources' : [ 'hidapi_mac.c' ],
+        }],
+        [ 'OS == "linux"', {
+          'sources' : [ 'hidapi_linux.c' ],
+        }],
+      ],
+    },
+  ],
+}