v1.4.0

• switch to the global npm version of spa-keys
• add devDependencies status shield
• switch to the global npm version of stb-eslint-config
• correct functional key codes
• switch to keys from rc with rework
• update eslint version
• enable Travis CI with eslint checks
• remove outdated keys
• correct repository address format
• switch to the MIT license
• add standby code
• use stb-eslint-config
• add guidelines for github contributing
• rename and rework
• add spa-keys inheritance and rework
• add spa-keys dependency
• correct docs
• correct gitter chat room address
• correct titles markdown
• correct author email
• correct scripts and keywords
• correct readme
• remove @module tag
• correct npm ignore file
• replace tabs with spaces