[TASK] Made changes in README.md file of Lelesys.Plugin.SEOHelper
[TASK]  Added open source license for class files.

Change-Id: I31783fbd5fd3987b4e921bcd0ac8e99dd55078ca
Merge "[TASK]  Added open source license for class files."
[TASK] Updated documentation of class file.
[TASK] Code cleanup