Big rework of registry.js

Part of #322

Loads node.html files before node.js files

Adds helper.unload which must be called by node tests
to clear the registery of nodes

test/nodes/core/core/20-inject_spec.js

@@ -23,6 +23,10 @@ describe('inject node', function() {
     before(function(done) {
         helper.startServer(done);
     });
+    
+    afterEach(function() {
+        helper.unload();
+    });
 
     it('should inject once', function(done) {
 

test/nodes/core/core/58-debug_spec.js

@@ -24,6 +24,11 @@ describe('debug node', function() {
     before(function(done) {
         helper.startServer(done);
     });
+    
+    afterEach(function() {
+        helper.unload();
+    });
+
 
     it('should be loaded', function(done) {
         var flow = [{id:"n1", type:"debug", name: "Debug" }];

test/nodes/core/core/80-function_spec.js

@@ -23,6 +23,10 @@ describe('function node', function() {
     before(function(done) {
         helper.startServer(done);
     });
+    
+    afterEach(function() {
+        helper.unload();
+    });
 
     it('should be loaded', function(done) {
         var flow = [{id:"n1", type:"function", name: "function" }];

test/nodes/core/core/80-template_spec.js

@@ -23,6 +23,11 @@ describe('template node', function() {
     before(function(done) {
         helper.startServer(done);
     });
+    
+    afterEach(function() {
+        helper.unload();
+    });
+
 
     it('should modify payload', function(done) {
         var flow = [{id:"n1", type:"template", field: "payload", template: "payload={{payload}}",wires:[["n2"]]},{id:"n2",type:"helper"}];

test/nodes/core/core/90-comment_spec.js

@@ -20,6 +20,10 @@ var helper = require("../../helper.js");
 
 describe('comment node', function() {
 
+    afterEach(function() {
+        helper.unload();
+    });
+
     it('should be loaded', function(done) {
         var flow = [{id:"n1", type:"comment", name: "comment" }];
         helper.load(commentNode, flow, function() {

test/nodes/core/parsers/70-JSON_spec.js

@@ -23,6 +23,10 @@ describe('JSON node', function() {
     before(function(done) {
         helper.startServer(done);
     });
+    
+    afterEach(function() {
+        helper.unload();
+    });
 
     it('should be loaded', function(done) {
         var flow = [{id:"jsonNode1", type:"json", name: "jsonNode" }];

test/nodes/core/storage/28-tail_spec.js

@@ -42,7 +42,7 @@ describe('TailNode', function() {
     });
     
     afterEach(function(done) {
-        
+        helper.unload();
         fs.exists(fileToTail, function(exists) {
             if(exists) {
                 fs.unlinkSync(fileToTail);