Update Makefile

TYPO IN THE CURL_DOWNLOAD specification.
Merge pull request #23 from vihari/patch-1

Update Makefile
Enforce the rate limit

The API allowed for the possibility of rate-limiting, but we hadn't
enabled it before. Today the API was starting to degrade due to
too many /assoc requests.

The rate limit is now 1000 standard requests or 100 assoc requests
per minute.
Merge branch 'master' of github.com:commonsense/conceptnet5
always expire rate limits from the cache after a minute
fix docstring
remove some verbiage using a relative import
Merge pull request #25 from commonsense/merge_metanl

Remove dependency on metanl.
add MANIFEST.in and dependency on ftfy
update the documentation diagram so it says "sources"

(not "source", which isn't what the property is called)
Tell setup.py to install support_data
use a specific beta version number
Merge branch 'version5.3'

Conflicts:
	conceptnet5/api.py
	data/Makefile
	setup.py
allow "make download" to run when the data/ directory doesn't exist yet
use flask_limiter instead of werkzeug.cache for rate limiting

The result is much cleaner anyway. Thanks, flask_limiter!
allow downloading a pre-built DB
change remaining references to 'python' to $(PYTHON)
add built versions of Wiktionary parsers
remove db downloading option; turns out it's enormous
msgpack needs bytestring arguments on Python 2