Lychee 2.5.6

• New Choose if album should be listed public (#177)
• New Gulp instead of Grunt with autoprefixer
• Improved Slightly better performance when opening big albums
• Improved Checksum with sha1 instead of md5 (#179)
• Fixed Missing public badge on public albums
• Fixed Wrong path for public photos in view.php
• Fixed Wrong link to thumbs when searching
• Fixed Wrong date in album view when takestamp was null
• Fixed It wasn't possible to rename albums while searching
• Fixed It was possible to right-click on SmartAlbums after searching