Use requirements.txt file for package dependencies

[joshfriend]

Some services look for this file when building an app.

[jacebrowning]

@joshfriend "some services"?

[joshfriend]

Sorry should have listed some examples:

• Heroku
• CircleCI

[jacebrowning]

@joshfriend and are you proposing that install_requires in setup.py would be set by reading from requirements.txt?

[joshfriend]

yes.

install_requires=open('requirements.txt').readlines()

[jacebrowning]

@joshfriend The only thing I don't like about that is that it's yet another file in the root of the working copy. Either way, this will need to:

• wait for Add a dependency and import it to test installation. #9