ch13-15: updated Mongoose to specific version (3.8).

This mirrors commit e47e9e4; just missed these earlier chapters.

Author: EthanRBrown

ch13/package.json

@@ -27,7 +27,7 @@
     "express3-handlebars": "~0.5.0",
     "formidable": "~1.0.14",
     "loadtest": "~0.2.11",
-    "mongoose": "^3.8.12",
+    "mongoose": "3.8",
     "morgan": "~1.1.1",
     "nodemailer": "~0.6.5",
     "session-mongoose": "^0.4.1"

ch14/package.json

@@ -27,7 +27,7 @@
     "express3-handlebars": "~0.5.0",
     "formidable": "~1.0.14",
     "loadtest": "~0.2.11",
-    "mongoose": "^3.8.12",
+    "mongoose": "3.8",
     "morgan": "~1.1.1",
     "nodemailer": "~0.6.5",
     "q": "^1.0.1",

ch15/package.json

@@ -29,7 +29,7 @@
     "express3-handlebars": "~0.5.0",
     "formidable": "~1.0.14",
     "loadtest": "~0.2.11",
-    "mongoose": "^3.8.12",
+    "mongoose": "3.8",
     "morgan": "~1.1.1",
     "nodemailer": "~0.6.5",
     "q": "^1.0.1",