Added dummy `reset`
Made `size` also accept the `auto` and `initial` values
Added support for a few basic resettable properties
Added a bit of documentation
Added some more resettable properties to `reset`
Added test case for `reset` with no arguments
Added `font-weight`, `font-style`, `font-stretch` and `line-height` to `reset`
Added `visibility` to `reset`
Added `box-sizing` to `reset`
Added `opacity` to `reset`
Added `cursor` to `reset`
Added `border-width` and `border-style` to `reset`
Added `transition` and all the `transition-*` to `reset`
Added tests for `size` with `auto` and `initial` values
Added `tab-size` to `reset`
Test refactor
Introduced the `initial-*` variables, to be used by `reset` and `normalize`
Made `normalize` aware of the `initial-*` values
Merge branch 'master' into issue-4-reset
Made `reset` aware of the `initial-*` variables