Publish Nerbus source snapshot and build documentation

models/networkhistory.js

@@ -0,0 +1,12 @@
+var mongoose = require('mongoose'),
+   Schema = mongoose.Schema;
+
+var NetworkHistorySchema = new Schema({
+  blockindex: {type: Number, default: 0, index: true},
+  nethash: { type: Number, default: 0 },
+  difficulty_pow: { type: Number, default: 0 },
+  difficulty_pos: { type: Number, default: 0 },
+  timestamp: { type: Number, default: 0 }
+}, {id: false});
+
+module.exports = mongoose.model('NetworkHistory', NetworkHistorySchema);