Add load command.

Use FileConceptNetwork to rewrite @save command, and to write @load command.
Use package.json to automatically give version.

lib/ector_command.js

@@ -8,6 +8,7 @@
  */
 "use strict";
 
+var config = require('package');
 var debug = require('debug')('ector:command');
 var util = require('util');
 var sugar = require('sugar');
@@ -17,7 +18,7 @@ var FileConceptNetwork = require('file-concept-network').FileConceptNetwork;
 var Ector = require('ector');
 
 program
-  .version('0.1.2')
+  .version(config.version)
   .option('-p, --person [name]', 'set the name of the utterer', 'User')
   .option('-b, --botname [botname]', 'set the name of the bot', 'ECTOR')
   .option('-q, --quiet', 'shut up!')
@@ -73,11 +74,11 @@ var help = function (command) {
                 "- @person    : change the utterer name (like -p)\n" +
                 "- @botname   : change the bot's name (like -b)\n" +
                 "- @version   : give the current version\n" +
-                "- @save      : save Ector's Concept Network and state\n" +
+                "- @save      : save Ector's Concept Network\n" +
                 "- @shownodes : show the nodes of the Concept Network\n" +
                 "- @showlinks : show the links of the Concept Network\n" +
                 "- @showstate : show the state of the nodes\n" +
-                // "- @load      : load Ector's Concept Network and state\n" +
+                "- @load      : load Ector's Concept Network\n" +
                 // "- @cleanstate: clean the state from the non-activated nodes\n" +
                 // "- @log [file]: log the entries in the file (no file turns off the logging)\n" +
                 // "- @status    : show the status of Ector (Concept Network, states)\n" +
@@ -155,22 +156,19 @@ var treatPhrase = function (phrase) {
         console.error('Error while saving to file cn.json!\n%s', err);
       }
     });
-    var cnsJson = new Buffer(JSON.stringify(ector.cns[ector.username].nodeState));
-    var fileName = ector.username.parameterize();
-    var fCNS = fs.open(fileName + '_state.json', 'w', function (err, fd) {
-      if (!err) {
-        fs.write(fd, cnsJson, 0, cnsJson.length, 0, function (err) {
-          if (err) {
-            console.error(err);
-          }
-        });
+  }
+  else if (phrase === '@load') {
+    debug('@load');
+    ector.cn.load('cn.json', function (err) {
+      debug(' end of cn.load', err);
+      if (err) {
+        console.error('Error while loading from file cn.json!\n%s', err);
       }
     });
   }
   else if (phrase.startsWith('@')) {
     console.log('This command does not exist.');
   }
-  // TODO: wrote @load
   // When it is not a command (beginning with @)
   else {
     var nodes = ector.addEntry(phrase);