Refact - Important refactoring

This pull request contains:

• packages upgraded
• babel-plugin-add-module-exports added for CommonJS compatibility
• npm script refactored
• project structure reorganized
• phantom.js timeout value customize (90s)
• version bumped

Chore - Codecov integration

• Codecov integrated into CI

Chore - Moment upgraded

• moment package upgrade

Feat - Language config

• You can override default language configuration

Chore - Eslint implemented

• eslint implemented
• small refactoring
• babel configuration updated

Chore - Dependencies upgraded

• All dependencies upgraded

Fix exports was missing

Module exports was missing.

Documentation updated

Install block added into README.md file

Many development changes

Many development changes, mocha and tests updated.
Coverage added.
Documentation updated.
Repository now public !

Version bumped

Version has ben bump to reflect tag.