improve: update selenium tests
improve: test example and automation
chore: add bin, update tests, add subtraction
feat: add controller and tests for multiplication
chore: Create view file and update automation

- improve all view logic into view.js
- improve automation
refactor: move dom helper to separate js
improve: add tests, improve mvc
chore: add version and repository field
chore: add stylus and update build scripts
chore: add stylus support and update build scripts
fix: equation operators
chore: add jshintrc
chore: bump version to 0.2