Remove calls from debug description that may block for 'some' (i.e. maybe a while?) time.
Merge pull request #27 from cbowns/master

Remove might-block-for-a-while calls from description
use Apple's flag instead of reinventing the wheel

solution for issue #28
Merge pull request #30 from ddrscott/patch-1

use Apple's flag instead of reinventing the wheel
Added licence & updated readme to include building docs.
Extra clarification in the docs
Added link to wiki page for projects using reachability