Update tile-slider.js to be consistent with other MetroUI-CSS plugins

$()["TileSlider"]({initAll: true}); now works. Generally, code was
adapted to be consistent with other of the plug-ins, using carousel.js
as a reference model for consistency. Comments converted to English
(this was not an original goal, but Eclipse ruined the original comments
and at that point, I figured English might make it more broadly
accessible.