Fix no paired key points in pairing function
Fix remote deploy bug

Mainly change pairing skip result
Also remove old preload module in pairing, replace with exp.tools.preloader
and it's override _reload method.
Improve pairing class with iter_data by given keys

Also move common config tools to lib.exp.tools.configurator
Add basic crossing function
Add xframe crossing result and its evaluator
support accuracy for no slide frame detection
add xframe eval plotter
modulize xframes related class
add slide to slide exps
Merge pull request #87 from speed-of-light/xf_exps

Xf exps