move custom pix_builder js in theme
++
Merge branch 'development' of github.com:pixelgrade/pixtypes into development

* 'development' of github.com:pixelgrade/pixtypes:
  pile builder - percentage cols
pix_builder wip
[gridster] dynamic widget width.

Adapt widget width by parent container

See pixlegrade/pile#22

Merge branch 'development' of github.com:pixelgrade/pixtypes into development

* 'development' of github.com:pixelgrade/pixtypes:
  pile builder - responsive ++

Conflicts:
	features/metaboxes/css/pix_builder.css
	features/metaboxes/scss/pix_builder.scss
fix pixelgrade/pile#31
merge