Add SMACSS property sort order

Based on http://smacss.com/book/formatting

Change-Id: I93a11cde8d820653dcd3d254adebdc8639f03e9c
Reviewed-on: http://gerrit.causes.com/45069
Tested-by: jenkins <jenkins@brigade.com>
Reviewed-by: Shane da Silva <shane.dasilva@brigade.com>
Adds local build instructions to README documentation