CSS, SCSS: update properties, functions, at-rules and more highlighting

New highlighting:

• Vendor Properties: properties prefixed with -webkit-, -moz, -o- or -ms-
• At Rule Text: text in @rules text
• Block Symbol: { and }
• Unknown Function
• Calc Constant: pi, inifity, e and NaN in calc()
• Condition Open/Close: ( and ) with @media and @supports
• Condition Property: properties in @media/@supports (prop: value)
• Media Type
• Property Separator: : in prop: value;
• Named Color
• Selector Symbol
• Attribute Name: name in [name=value]
• Attribute Operator symbols and operator (s/i) in [name=value i]

Also contains a script capable of extracting properties and functions from an mdn or sass repository and updating the syntaxes.