Adapting images

Added the ability to handle images of different sizes (images scale).
Added the following boolean options: 
<ul>
<li>
<code>adaptImages</code>. <b>Default value:</b> <code>false</code>. <b>Description:</b> When set to <code>true</code>, uses images instead of backgrounds and scales the images to the maximum dimension available.
</li>
<li>
<code>useLargerImage</code>.<b>Default value:</b> <code>true</code>. <b>Description:</b> When set to <code>true</code>, uses the larger image dimensions as the maximum dimension available. Otherwise, it uses the slider width as the maximum available.
</li>
<li>
<code>alignBottom</code>.<b>Default value:</b> <code>false</code>. <b>Description:</b> When set to <code>true</code>, aligns the bottom right corner of the scaled images with the bottom right corner of the slider. Otherwise, the images are aligned to the top left of the slider.
</li>
</ul>