Ignored some more files.
Moved some code.
Simplified the reporting of attachment file sizes by using the blob's length.

Now a 'content-length' metadata.rst header is ignored.
Improved filtering of children to accomodate for improved indexing later.
Added some fields to a page revision document entry to make searching py path/slug easier.
Added separate fields for each type of data so nested queries might work correctly.
Made the 'PageNotFound' exception more flexible so it doesn't care about the constructor arguments.
Updated application to support the new index schema.

Most things seem to work correctly but many things are probably broken.