Module shuffling
Breakpoints now in support module
Support module divided into subfolders (breakpoints, browsers, modules, prefixes)
Manifests updated
Fixed broken imports
Add version intelligence to browsers
Set and check minimum required browser
Prefixing happens based on minimum browser
Prefix values use pairs as keys instead of hyphen separation
Prefix browsers stored as a list of pairs (browser slug to last version requiring a prefix)
By default, flexbox mixins automatically determine support for older specs
Tweaked test styles