Removed unused images

Removed unused image files from site.
All NavaRasam images

All NavaRasam images - Thumbs & Full.
Hiding actionable items in home page

Hiding actionable items in home page since it is redundant.
Removing unused CSS

Removing unused stylesheets.
Minor tweaks to gallery

Minor tweaks to gallery appearance:
1)  Now calculating width per event for the no. of images per row;
2)  Minor margin and border updates to existing buttons;