New way to reset the API

Added

• A CHANGELOG file was added to document changes to the project
• The reset method should now be used instead of the previous
  replaceWithAnotherScormAPI method. It resets the API to its original state
  cleanly, instead of having to create a whole new API.

Removed

• The replaceWithAnotherScormAPI method was removed. It caused issues with
  SCOs that keep a pointer to the original API after replacing it a few times.

Enhancements and fixes

Changes since 1.1.0

• #14 Add multiple listeners at once
• #15 Add Travis CI Integration
• #25 Fix _count returning an empty string when length is 0

Adding of SCORM 2004 API

Thanks to all the hard work that went into this by XOB (https://github.com/xob)!

Adds support for SCORM 2004 API

Simplify Scorm 1.0 Release

After some feedback and some tweaks, I am officially labeling this the 1.0 release!