value function signature changed:
    color: v => console.log(v.raw, v.cooked, v.node, v.result)

v.raw is previous value before any plugin
v.cooked is previous value after all plugin and validation check

• value-function: add v.raw, v.prev->v.cooked
• v.raw only exists when it have value previously, so raw in v make sense
• remove strSugar of '&'
• result.options renamed => result.config
• config.state act as initial state (fallback state)

• splitSelector instead of splitComma, better performance

• drop IE<8 support
• add result.space, result.localNames props
• revised docs

options.local.prefix renamed to options.local.space

• api: update now is result.update(obj?, state?)
• api(cssom): prefixes->vendors, name->id
• cssobj/update can accept function as obj
• fix(localize): prefix will set back to options.local

CHANGE: node.rawVal changed to ARRAY; remove helper.defauts function

FIX: option.plugins default as array instead of {}, accept single function as initial plugins value

FIX: file version error in source

• FIX: plugin function key param as Number bug, use propName instead
• Pass propKey param into value plugin function

• Value/ValueFunction/ValuePlugin can now return Object/Array that will be merged into node's prop.
• Remove display and flex prop check in CSSOM