FABN-626 Make pkcs11js optional

So long as no further native modules are
introduced, the node-sdk should install onto
windows systems without having to install
windows compilers

Signed-off-by: Dave K <d_kelsey@uk.ibm.com>
Change-Id: I96ca10d84dded85ab57fdb69885ac6d8b746ed71

fabric-common/package.json

@@ -29,11 +29,13 @@
 		"js-sha3": "^0.7.0",
 		"nano": "^6.4.4",
 		"nconf": "^0.10.0",
-		"pkcs11js": "^1.0.6",
 		"sjcl": "1.0.7",
 		"winston": "^2.2.0",
 		"yn": "^3.1.0"
 	},
+	"optionalDependencies": {
+		"pkcs11js": "^1.0.6"
+	},
 	"devDependencies": {
 		"chai": "^4.1.2",
 		"chai-as-promised": "^7.1.1",