Add documentation to the library

[dschoenbauer]

task: #2

Fixes

Fixes #2

Changes proposed in this pull request:

-Adds documentation to the class
-Adds apigen documentation
-Updated readme.md to have relevant information

Checklist

place an x confirming all items have been verified

• Unit tests coverage exceeds or maintains current levels (run command: composer test)
• Code Sniffer has reported zero issues (run command: composer inspect)
• Documentation is thorough and rich in content

[coveralls]

Coverage remained the same at 100.0% when pulling dd6c3c7 on feature/2-update-read-me into f5e21a6 on develop.

[coveralls]

Coverage remained the same at 100.0% when pulling dd6c3c7 on feature/2-update-read-me into f5e21a6 on develop.