Added @Output events

[JordanW9232]

• Added @output decorator for all events so they will be recognized in angular html templates.
• The EventEmitters will never actually emit any events though, since bootstrap-markdown is already emitting events, we can't use the EventEmitters or else the events will get fired twice.
• I chose to make all the event emitters private just in case someone ever used @ViewChild or @ViewChildren and tried to access them and found that they don't actually do anything.
• fixes Missing Typings for Event Hooks in HTML Template #40

[ghiscoding]

great I didn't think it was that simple, I'll merge and push a release sometime this week. Please remind me if I forget to release it within a week. Thanks for your contribution

[ghiscoding]

@JordanW9232 sorry for the delay and thanks again for the great contribution, now released under v3.1.0