v1.4.0

• add devDependencies status shield
• switch to the global npm version of cjs-emitter
• switch to the global npm version of spa-eslint-config
• update eslint version
• enable Travis CI with eslint checks
• update dependencies
• correct dependencies
• correct repository address format
• switch to the MIT license
• rename global webpack flag DEBUG to DEVELOP
• set explicit dev dependencies
• use spa-eslint-config
• switch all sdk dependencies to github
• fix eslint warnings
• fix eslint no-process-exit warning
• add guidelines for github contributing
• add speed-optimized clear method