Improvements

[arthurTemporim]

This PR has many improvements about this connector, the improvements can be used in version 0.0.10.

• [X] Upgrade documentation;
• [X] Remove react code;
• [X] Add the Rocket.Chat pattern to environment variables;
• [X] Upgrade package.json
• [X] Apply eslint to code
• [X] Improve the way that the bot is added to rooms using config.js file

[arthurTemporim]

fixes #4