support for the application factory pattern

[WTRipper]

At the moment I am not able to initiate flask-markdown with the application factory pattern. Would be nice if this will be supported in future.

from flaskext.markdown import Markdown
markdown = Markdown()
def create_app(config_name):
    app = Flask(__name__)
    markdown.init_app(app)

Btw standard flask extensions can be imported like from flask_markdown import Markdown. Why is it not like this?

Seconded, I would also like to see support for the application factory pattern. I may try to implement it on my own.

[duarteocarmo]

Would love to see this!

[Demian87]

#20
Here is a request for it