Refactor Telegram menus

Fetch all symbols for Binance before starting websocket

Allow Telegram menus to be edited at any point

Fix a typo

Add slack notifications to travis-ci

Minor cleanup in Telegram keyboard menu

Add NLog config file

Copy NLog config file to output directory

Update README

Update README

Hide a setter that should not have been exposed

Code cleanup

Update README

Create .travis.yml

Update README.md