Still needs lots of polish.

If the query has more results in the cursor, query for those results
when you hit the bottom of the visible results on the page.

Currently ThreatExchange only allows for Threat Descriptors being
uploaded so that is the only interface built right now.

ThreatExchange Service

Now actually shows if there's not enough data to import.

Adds ability to configure headers, proxies, and verify for requests.

Properly parse the options to pass into requests.

This adds Releasability tracking for exported Indicators. Also converts
the "Type" and "Threat Type" fields on export to be selects. If the
Indicator Type or Threat Type doesn't match one that ThreatExchange will
accept, it will provide a warning letting you know a valid one needs to
be selected and the "Submit" button will be disabled until a valid one
is selected.

… taxii_updates

Conflicts:
	taxii_service/templates/taxii_agent_results.html
	taxii_service/views.py

TAXII Service Updates

Create CONTRIBUTING.md

Simplified lsb_release logic

update requirements for pyimpfuzzy

ThreatExchange no longer supports ThreatType or AttackType. Removing
ThreatType from export and instead adding both Threat and Attack types
as tags on export.

Update from original

Still needs a LOT of clean-up, but it works when tested with the latest
verison of CRITs and MISP 2.4.69.

Update README, make easier config file, and add testing script.