Add support for content negotiation in swh's API
Using these 2 negotiate formatters, it is possible to write Flask endpoints
as:
from flask import Flask
from negotiate.flask import negotiate
from swh.core.api import JSONFormatter, MshpackFormatter
app = Flask()
@app.route('/somewhere')
@negotiate(MsgpackFormatter)
@negotiate(JSONFormatter)
def somewhere():
return {'some': 'content'}