Doc block has updated.
Doc block has updated on core files
Documentation added
Merge branch 'dev' of https://github.com/sanjoy87/appsntech-dev-team into dev

# By AppsnTech Dev Team
# Via AppsnTech Dev Team
* 'dev' of https://github.com/sanjoy87/appsntech-dev-team:
  Update README.md
  Update README.md
  Update README.md
  Update README.md
  Update README.md
  Update README.md