Add support for chained tokens replacement
Add tests for chained tokens
add language override
Support falsy values
Merge branch 'chained-tokens' of github.com:cristiandouce/t into cristiandouce-chained-tokens

Conflicts:
	index.js
Merge branch 'lang-override' of github.com:stagas/t into stagas-lang-override

Conflicts:
	index.js