Improved the meaning of the "not" shorthand syntax

'not' is now short hand for not all instead of not screen. This is more what I was trying to go with originally but I wasn't sure what the proper syntax was.

Added automated unit-tests

v2.1.2

Tagging as v2.1.2

Media type only statements now supported

• Now supports media type only statements. (@include mq('print') or @include mq('not' plus (max, 600px)))
• Added the ability to debug mq statements by setting either the local $debug setting or the global $mq-debug setting to true.
• Added a proper testing/demo environment to the repository (check out repo > npm i > gulp --open).
• Added support for not as a short-hand for not screen media types.

Custom media types!

• Added the ability to define custom media types for individual mq statements.
• BREAKING CHANGE: By default, no media type is added to the media query (previously it added "screen" as the media type to all media queries).
  • If upgrading from v1.x you may want to add "screen" to the end of all your MQ statements to retain consistency with v1.x.
  • eg. from @include mq(max, 800px) to @include mq(max, 800px, 'screen').

"inside-width" and "outside-width" are now valid range types

Made inside-width and outside-width valid range types that can be used instead of inside and outside.

"min-width" and "max-width" are now valid range types

Made min-width and max-width valid range types that can be used instead of min and max.

All new "plus" keyword!

• Added the plus keyword for improved handling of "and" statements.
• Changed the breakpoints list example to just a list of variables.

Outside range type can be nested & no more $mq-largest-first variable

• Removed the need for the $mq-largest-first variable. You can now state double value breakpoint values in any order.
• Outside range types can now be safely nested and take advantage of the Sass nested media queries functionality.
• Updated the MQ variable syntax to what I currently use.

Added $mq-largest-first setting

Added the ability to state the smaller value first by setting an $mq-largest-first variable to false.