Bootstrap Functions added twice

[hsankala]

In css/src/core/_index.scss we import the WebPixels functions.

https://github.com/webpixels/css/blob/bcfd10ac36371ed428e67279c8f89d04a89f79ab/src/core/_index.scss#L2

The first thing the custom functions file does is import the bootstrap functions: https://github.com/webpixels/css/blob/bcfd10ac36371ed428e67279c8f89d04a89f79ab/src/core/_functions.scss#L7

Then further on in the core index.scss file we pull in the bootstrap functions again: https://github.com/webpixels/css/blob/bcfd10ac36371ed428e67279c8f89d04a89f79ab/src/core/_index.scss#L8