Mlbgame

New Features:
- Add probable starter attributes (64, fixes 32)
- Add more attributes to overview (71, 70, fixes 68)
- Add important dates feature (85, fixes 84)

Bug Fixes:
- Updated README and documentation to show correct output from examples (75)
- Fix incorrect date for scoreboard function (78, fixes 77)

* Remove unneeded `import requests` statement, thereby removing `requests` as an accidental and unlisted dependency
* Better stats retrieval through `rawboxscore.xml` (58, fixes 30)
* Fix bug which removed away team stats (58, fixes 57)
* Fix failing tests

* Fixes a bug where game data could not be retrieved (50, 51)
* Refactor multiple internal methods to reduce duplication

New Features
- Add ability to get player, coach, and umpire data for game (43)
- Add ability to get current roster data (34, 27)
- Add ability to get current injury data (36)
- Add ability to get current and historical standings data (33, 31)

Deprecations:
- Removed ability to locally cache XML data

Developers:
- Added test cases with 97% coverage
- Added Travis CI and Coveralls
- Added code climate
- Added new dev install requirements
- Refactored existing code to reduce duplication
- Added Slack for developers to join

Fixes a bug where game data would not work for July (month 7) (29)

- Fixes a bug where .gz files would not work automatically on Windows machines (24 fixed in 28, thanks russodanielp)
- Fixes a bug where game type would not accurately be reported (name changed from `game_type` to `game_tag`)
- Internal refactoring and miscellaneous documentation changes