Added description column into albums.
So yeah, now albums can have description.
It'll only be shown in the album's edit popup and public link.
HTML chars will now be escaped from album's name and description.
Removed message warning about CDN cache from album's public link.
A shortened version will be shown as the download button's tooltip.
Darkened color of textarea's placeholder.
Bumped v1 version string.
* Better thumbnails view in album page (it's now using the same styling as the one in dashboard, minus the on-hover effects and uploader/album names).
* Fixed unenclosed p tag in thumbs view at dashboard.js. It did not cause any issue because it's optional to enclose it, but oh well.
