Putting celery in requirements
Merge branch 'master' into celery

Conflicts:
	requirements.txt
Firsts steps for use celery: creating task file
Adding to new function for tasks and take off logical from pool and
multiprocessing from client
Adding entry for starting redis in makefile
Adding a requirements for externals deps like mongo and redis
Adding config for broker url to use for celery
Addinga procfile to use honcho for manage process
Putting alls things working together for celery and redis
Changing celery command start