export Notification from notification.type

[Caballerog]

Export Notification from notification.type which is useful in typeScript return type for example:

method1(param1: string, param2: string): void | Notification {
   if(condition)
     return this.notificationService.error('ERROR', 'Summary');
   }
 }

[Caballerog]

I don't know why travis-ci failed:

npm ERR! Linux 4.4.0-51-generic
npm ERR! argv "/home/travis/.nvm/versions/node/v5.12.0/bin/node" "/home/travis/.nvm/versions/node/v5.12.0/bin/npm" "run" "test"
npm ERR! node v5.12.0
npm ERR! npm v3.8.6
npm ERR! code ELIFECYCLE
npm ERR! angular2-notifications@0.4.47 test: karma start
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the angular2-notifications@0.4.47 test script 'karma start'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the angular2-notifications package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! karma start
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs angular2-notifications
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls angular2-notifications
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! /home/travis/build/flauc/angular2-notifications/npm-debug.log
The command "npm run test" exited with 1.

[flauc]

Huh, I think that wasn't you. I must have been tinkering with travis right about when you pushed.
I'll merge now, thanks for the PR 👍