Merge branch 'v0.3.x_Jed'

* v0.3.x_Jed:
  v0.3.19
  Update CHANGELOG
  Backporting connect-mongo fix, ref. keystonejs#2645
  malign support
  v0.3.18
  Update CHANGELOG
  Removing refs to private domain
  Email prototype: allow headers. Fixes keystonejs#2687

HISTORY.md

@@ -2,6 +2,18 @@
 
 KeystoneJS is maintained by [@JedWatson](https://github.com/JedWatson) and an amazing team of contributors. All contributions are given credit here except for Jed's.
 
+## v0.3.19 / 2016-05-04
+
+* added; support for Mailgun, thanks [Wolfgang](https://github.com/w01fgang)
+* fixed; issues with connect-mongo on Node 0.12, thanks [gemscng](https://github.com/gemscng)
+
+## v0.3.18 / 2016-04-27
+
+fixed; make localfiles previews properly show up in admin ui column, thanks [Gabor K](https://github.com/krksgbr)
+improved; allow adding headers when sending email, thanks [Joss Mackison](https://github.com/JossMac)
+
+This is a hotfix release to allow for adding headers when sending emails.
+
 ## v0.3.17 / 2016-03-23
 
 * fixed; issue when keystone is a dependency of a global package, thanks [Robert Jensen](https://github.com/erg0dic)

lib/core/mount.js

@@ -137,6 +137,9 @@ function mount(mountPath, parentApp, events) {
 		switch (sessionStore) {
 			case 'connect-mongo/es5':
 				debug('using mongo for session store');
+				if (process.version.substr(0, 4) === 'v0.1') {
+					sessionStore = 'connect-mongo/es5';
+				}
 				_.defaults(sessionStoreOptions, {
 					collection: 'app_sessions',
 					url: this.get('mongo')