Correct lightbox by adding missing font and updated ekko-lightbox.js

[nununo]

While trying to use the theme's existing ekko-lightbox I found that:

• the arrows were not showing because font glyphicons-halflings-regular.ttfwas missing
• the images were not being properly resized because an old version of ekko-lightbox.js was still being used

This PR add the missing font and updates ekko-lightbox.js file.

After these two changes lightbox is working fine:

<a href="/photo1.jpg" data-toggle="lightbox" data-gallery="gallery1">
  <img src="/photo1.jpg" width="100%"/>
</a>
<a href="/photo2.jpg" data-toggle="lightbox" data-gallery="gallery1">
  <img src="/photo2.jpg" width="100%"/>
</a>

[kishaningithub]

Thanks for the PR @nununo !! :-)

[nununo]

Thanks for the PR @nununo !! :-)

I am the one who thanks you! :-)