Enable touch events for the stage and audio trimmers

Update all react deps to most recent version

Update css-loader to the latest version 

Update babel-cli to the latest version 

Sprite info area design updates

Update eslint packages and fix indentations

Fix all lint warnings except todo comments (including a bug!)

Context menu

Update webpack and related packages

Confine add buttons to stage and sprite selectors

Update react-modal to the latest version 

Update wav-encoder to the latest version