updated attribute handling in constructors
changed to using require_once instead of require
Merge branch 'develop'
Merge pull request #5 from jeffbyrnes/master

Use correct value for all instances of `CURLOPT_SSL_VERIFYHOST`
updated for 1.3.0
Update CHANGELOG.md
Consistent usage of tabs for indentation
Clean up documentation, add DocBlocks for every method of `ApiClient`

Still needs more detail, but it will need to be provided by HelpScout