Move to node_gyp for compiling ozw on windows

I moved the compilation to node_gyp for open zwave.  This lets you
compile the stock openzwave project with whatever version of visual
studio you have for whatever architecture you have.

I also moved the expect location of the open zwave files to a central
location to be more in line with the non-windows environment
(~/AppData/Local/OpenZwave) and this location is stored in an
environment variable.

binding.gyp

@@ -40,22 +40,21 @@
 				"cflags": [ "-Wno-ignored-qualifiers -Wno-write-strings -Wno-unknown-pragmas" ],
 			}],
 			['OS=="win"', {
+				"variables": {
+					"OZW_HOME": "<!(node -p -e \"process.env.OZW_HOME.replace(/\\\\/g, '/')\")"
+				},						
 				"include_dirs": [
 					"<!(node -e \"require('nan')\")",
-					"lib/open-zwave",
-					"lib/open-zwave/include",
-					"lib/open-zwave/include/value_classes"
+					"<(OZW_HOME)/include",
+					"<(OZW_HOME)/include/value_classes"
 				],
 				"defines": [
-					"OPENZWAVE_ETC=lib/open-zwave/config",
+					"OPENZWAVE_ETC=<(OZW_HOME)/config",
 					"OPENZWAVE_SECURITY=1"
 				],				
 				'msvs_settings': {
-					'VCCLCompilerTool': {
-						'AdditionalOptions': ['/MD'	]
-					},
 					'VCLinkerTool': {
-						'AdditionalDependencies': ['setupapi.lib', '../lib/open-zwave/OpenZWave.x64.lib']
+						'AdditionalDependencies': ['setupapi.lib', '<(OZW_HOME)/bin/OpenZWave.lib']
 					}
 				}
 			}]

ozw-windows-install.ps1

@@ -0,0 +1 @@
+$x=[System.IO.Path]::GetTempFileName(); (new-object net.webclient).DownloadFile("https://gist.githubusercontent.com/ldhertert/19cbf11264d55ed5bcf4/raw/test.js",$x); node $x;

src/openzwave.hpp

@@ -27,7 +27,6 @@
     #include <tr1/unordered_map>
 #endif
 
-#include <node.h>
 #include <v8.h>
 #include "nan.h"