implement new fetch syntax
fix default (fetch all) fetcher
use new fetch syntax
implement new fetch syntax for value matchers
use new value fetcher syntax
move access_field to utils, remove is_valid_path stuff
add test for byValueField sorter
add test for byValueField sorter
new fetch syntax (the last commit), ludent (this commit)
wrap preds in pcall
value matcher adds a type matcher if sort by value is used
fix
add equals_deep and mapper util functions for "map" feature
Merge pull request #19 from lipp/new-fetch-syntax

implement new fetch syntax