added a link to the gh-pages copy of the slides
Added accessibility demo
Logo for Mobile Learner Labs
Added MLL logo to page
Added a challenge note
add slides for "Translations" section
Added screenshots of the in-progress sims
Removed unused slide
Improved layout for sim screenshot slides
Several revisions to the slides
Added a summary of project types in a pie chart
Minor additions and rewording
Added some logos and pictures related to Mobile Learner Labs.
Added picture of MLL team and incorporated logo slide.
Added image of PhET's "All Sims" page.
Updates to MLL slides.
Removed unneeded divs.
More slides for the MLL section.
Fixing meta author and description
Fixing unescaped ampersands (and a few non-breaking spaces)