test => shift forward
test => shift backward
test => compile
refactoring => make creation into fixture
test => encode
test => decode
refactoring => remove duplication
test => translate lowercase to uppercase
test => output others
test => shift
Merge branch 'caesar_cipher_helper' into master
add test into all-tests.html
refactoring => change signature & remove redundant parameter
Merge branch 'caesar_cipher_helper'
test => encode
test => encode in cycle
test => decode
test => encode in cycle
refactoring => make cipher into fixture
refactoring => remove duplication