…ns other table which cause ambiguous id error
…'s ID unless the current record is saved.
Explain in the readme that position numbers are zero-indexed
Added possibility to pass first, middle and last position as string.
…dy out of the way
Minor typo fix
…at. Fixes #6
…ent_at_position calls to a single query with neighbors_at_position
…chmarks: http://blog.codegram.com/2011/3/benchmarking-actsaslist-vs-rankedmodel-vs-resort. Also add some simple position logic.