Merge pull request #13 from wikipathways/gh-pages

latest from Anders
Merge pull request #14 from wikipathways/master

updating from master
Merge pull request #15 from khanspers/master

Merge pull request #14 from wikipathways/master
Update pan-zoom.css
Update pan-zoom.css
Update pan-zoom.css
Update pan-zoom.css
Update pan-zoom.css
Update pan-zoom.css
Update pan-zoom.css
Update pan-zoom.css
Update pan-zoom.css
Update pan-zoom.css
Update pan-zoom.css
Update details-frame.css
Update pathvisio-js.html
Update details-frame.css
Update pathvisio-js.html
Update details-frame.css
changed span id from "details-frame-close" to "details-frame-header-close" to match css