Replaces build tasks with Gulp
Replaces build tasks with Gulp

* generates list files (min and not)
* generates `lib` folder with transpired ES6
* moves ES6 code to in `src` folder (actual move of files will be committed separately)

paultyng/field-kit,shyamalschandra/field-kit,shyamalschandra/field-kit,greyhwndz/field-kit,paultyng/field-kit,square/field-kit,square/field-kit,damiankaplewski/field-kit,daverome/field-kit,square/fieldkit,UmarMughal/field-kit,BionicClick/field-kit,janusnic/field-kit,damiankaplewski/field-kit,greyhwndz/field-kit,square/fieldkit,daverome/field-kit,UmarMughal/field-kit,BionicClick/field-kit,janusnic/field-kit