Create BEM Style Guide

[sfrisk]

As we've decided to go with a BEM naming convention, to help people easily contribute to the Chassis project, we need a BEM Style Guide to help understanding the naming convention as we're using it.

[sfrisk]

Going along with the BEM Style Guide, here are some examples of the "flavor" of BEM we decided on:

.ui_base__some-element--modifier--another-modifier
.ui-button__icon--rainbow-mode

[kristyjy]

Since we aren't using BEM anymore should we just include our css naming conventions with the SCSS style guide?

[geekman-rohit]

@kristyjy , yes, and some guidance to use of classes, and other practices we use... no cascading, no specificity, how we name variables, use of jsass etc.