Adding a feature to DM the quotes to all the followers

[Vinit Shahdeo]

Add a feature to this bot to send the quotes to its followers daily.

Use Twitter API for sending direct messages.

Note - Make only required changes and ensure that the existing functionality of code shouldn't break.

[Craig Ramsden]

Hi, Ive submitted a PR for review as I'd like to tackle this.

[Vinit Shahdeo]

@Crammers Thanks for the PR. You may also look into a few more issues here!