v1.4.0

• add devDependencies status shield
• switch to the global npm version of cjs-gettext
• switch to the global npm version of cjs-emitter
• switch to the global npm version of spa-eslint-config
• reorganize code and improve docs
• fix missing gettext methods
• switch to cjs-gettext
• update eslint version
• enable Travis CI with eslint checks
• fix eval in strict mode
• correct or rollback invalid changes
• various fixes to components
• correct repository address format
• switch to the MIT license
• correct DEBUG to DEVELOP in description
• rename global webpack flag DEBUG to DEVELOP
• use spa-eslint-config
• switch all sdk dependencies to github
• fix eslint no-path-concat warning
• add guidelines for github contributing
• correct description