Added ability to turn on/off the auto-hiding of the controls

.js - created 'autoHideControls' as an option to allow the disabling of
the default auto-hiding of the controls so the arrows could stay
visible at all times if desired.

.css - removed 'display:none;' from the control elements

.js - had the js add the display:none css to the controls if auto-hide
is left on or set to on, this way when autohide is turned off, the
arrows can display.

min.js updated to reflect the changes in the .js file