Nlp2fn

- Refactored code, Added Source Controller which is responsible for handling and keeping record of sources and related NLP statement.
- Added Interface
- NLP statement is searched inside all sources. Previously NLP statement related to a selected source was only used.
- Create Proper Function to NLP record.
- Provided option to updated added source.

- Added Check to make sure a directory is not added as function source for multiple time.
- Added function to download repo from git and add its events as source.

- Updated Readme.

- Initial release, Able to load function from local directory, remote directory feature is still remaining to add.