added lines() function.
Merge pull request #47 from daxxog/pull1

added lines() function.
update readme with `lines()` contribution
update changelog
added roadmap
v1.5.0
Fixes bug in `template()` for falsey values. Closes #29
added Makefile
new min
v1.5.1
update makefile
Adds ability to extend string.js.
Added comments for extendable string.js.
Added to README.md for extendable string.js.
Merge pull request #57 from jeffgrann/master

Add Ability to Easily Extend string.js
update readme
remove +x flag from package.json
v1.6.0
v1.6.0, update VERSION in file
update readme with extending info