Note for ES6 version

Note for the ES6 version of infuse.js

• regex function

http://regexr.com/3e241

• regex function ES6

http://regexr.com/3e244

• regex class ES6

http://regexr.com/3e24a

• problem to fix

http://regexr.com/3e3tj http://regexr.com/3e5f0

• convert string to number (to handle default argument in ES6)

http://stackoverflow.com/questions/175739/is-there-a-built-in-way-in-javascript-to-check-if-a-string-is-a-valid-number