feat(index.js): go for ./lib directly
style(lib): require Yoda conditions
style(lib): space before function opening round brace
style(lib): disallow multiple var decl
style(string_split): safe context keyword
test(index.js): add jscs to suite with .jscsrc
chore(package.json): update mocha in devDependencies
chore(.gitmodules): update repos url
chore(package.json): give mocha a specific test path