Fixed meta date and empty links issues 22-24
Merge remote branch 'upstream/master'
New Thumbnail feature

Implemented thumbnail feature with image alignment options like in DokuWiki image syntax. Only works for right alignment.
Thumbnail feature
The thumbnail option now also works for external images

Changed default thumbnail size to 100px in width with auto height

Allows full size images when the user specifies either "0" or "0x0" as image size

The "current" class is now added to the list item of the currently viewed page. This is usefull for CSS styling when pagequery is used in the sidebar.
Fixes a crucial bug with the thumbnail implementation.

Previously thumbnails were always displayed, even if the "thumbnail" option wasn't given at all.