OpenDota API 18.0.0

OpenDota API 18.0.0 support

• playersByRank() --- whoops, weird naming
• parsed_matches()
• constants($resource)

OpenDota API 17.6.1

OpenDota API 17.6.1 support

• Scenarios (itemTimings, laneRoles, misc)
• Admin (apiMetrics)

OpenDota 17.6.0 API - improvements update

• add 404 handle
• minor fixes to how API key support works

api-17.6.0: OpenDota API 17.6.0 support

* API key support
* New request cooldown values
* Empty value handlers

api-17.5.0: Merge pull request #1 from leamare/add-license-1

Create LICENSE