Google Assistant Broadcast Versions Save

• feat: Add support for sending commands (closes #10)

• feature: #7 Add validation of the OAuth 2.0 Client Id file at startup to make sure that correct file has been used
• docs: add possible solutions on known issues

Full Changelog: https://github.com/ismarslomic/google-assistant-broadcast/compare/v1.0.5...v1.0.6

• Check that required files (Client Secret and Tokens) exists at startup of the container and exit with error if validation fails
• Add timestamp to log statements

Partial solution for #5 .