Add inline-block check to Compass::PropertyWithMixin

See http://compass-style.org/reference/compass/css3/inline_block/

Change-Id: I3b82f4b67050d8186b87c6d751b1e5e0f2362864
Reviewed-on: http://gerrit.causes.com/37269
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>