Work on refactoring measurements out of Lesion Tracker package

- Removed AssociatedStudies Collection
- Measurement API is generated from configuration files
- Data exchange methods are defined in configuration

Packages/ohif-user-management/client/active-entry/activeEntry.js

@@ -0,0 +1,36 @@
+Meteor.startup(function() {
+    if (Meteor.isClient){
+        ActiveEntry.configure({
+            logo: {
+                url: '/images/logo.png',
+                displayed: true
+            },
+            signIn: {
+                displayFullName: true,
+                destination: '/'
+            },
+            signUp: {
+                destination: '/'
+            },
+            themeColors: {
+                primary: ''
+            }
+        });
+    }
+
+    if (Meteor.isServer){
+        Accounts.emailTemplates.siteName = 'AwesomeSite';
+        Accounts.emailTemplates.from = 'AwesomeSite Admin <accounts@example.com>';
+        Accounts.emailTemplates.enrollAccount.subject = function(user) {
+            return 'Welcome to Awesome Town, ' + user.profile.name;
+        };
+
+        Accounts.emailTemplates.enrollAccount.text = function(user, url) {
+            return 'You have been selected to participate in building a better future!'
+                + ' To activate your account, simply click the link below:\n\n'
+                + url;
+        };
+
+        process.env.MAIL_URL = 'smtp://sandboxid.mailgun.org:mypassword@smtp.mailgun.org:587';
+    }
+});