feat(timer): cancel interval on destroy of element
feat(kana): time over count as failure
feat(test): add sinonjs to tests
test(timer): add unit test for timer directive
test(kanaService): add unit test
test(kana): add test for controller
fix(css placeholder): add forgotten & to actually apply them
fix(build): include common dir in release + fix tabs in build-config
fix(scss): only include the style i need
fix(git): remove release/ from gitignore
feat(GA): add google analytics snippet
feat(0.1): release v0.1