added methods and routes for getting an exercises history, and the sum of a workouts musclearrays -- incl a modifier

data/schemas/user.js

@@ -1,13 +1,21 @@
 var mongoose = require('mongoose');
 var Schema = require('mongoose').Schema;
 
+
+var ExerciseStat = new Schema({
+  exerciseID: { type: Schema.ObjectId, ref: 'Exercise'},
+  modifier: {type: Number}
+});
+
+
 var UserSchema = new mongoose.Schema({
   username: {type: String, unique: true, required: true},
   name: String,
   password: String,
   is_admin: {type: Boolean, 'default': false },
   is_imperial: {type: Boolean, 'default': false },
-  favorites: [{ type: Schema.ObjectId, ref: 'Exercises'}]
+  favorites: [{ type: Schema.ObjectId, ref: 'Exercises'}],
+  exercisestats: [ExerciseStat]
 });
 
 UserSchema.methods.recentworkouts = function(callback) {

data/schemas/workout.js

@@ -8,7 +8,8 @@ var Split = new Schema({
 
 
 var Element = new Schema({
-  exerciseID: String,
+  exerciseID: { type: Schema.ObjectId, ref: 'Exercise'},
+  modifier: {type: Number},
   splits: [Split]
 });