basic http error handling

It might be basic, but it works exactly as it should. It points
out the error, and even recovers if we manage to turn the other way.

Signed-off-by: Zeljko <zeljko@zwr.fi>
load around a word

This not so efficient (but needed) method loads documents
'around' given document. It only redefines the index parameter, the
rest is used as usually, including the offset.

Signed-off-by: Zeljko <zeljko@zwr.fi>
improved harvester and bestseller crops def

Signed-off-by: Zeljko <zeljko@zwr.fi>