Merge pull request #77 from ljos/master

Add quartz framework, remove a ,
small typo fix in README.md
Merge pull request #79 from lathan/master

small typo fix in README.md
Alter README to include tcl/tk deps

While installing on FreeBSD I found I did not have the Tkinter lib.
TK is a bit awkward to install too, and so I have added a couple of
extra lines to make life simpler.
Merge pull request #82 from mikadosoftware/minor-install-doc-change

Alter README to include tcl/tk deps
Add information on assitive devices in OS X 10.9.