remove the  useless parameters  and  update import

update-2020-7-27

fix save img for pred_det

fix a typo

fix hub serving doc

Update paddle serving readme.md support py3

the function sample_iter_reader  is executed repatedly,so the common modules do not need to be executed repeatedly

Merge pull request #417 from BeyondYourself/develop

The if condition is not sufficient when train the det model

when you trian the det model , there is not the var: loss_type in the Global, so  train_alg_type == 'rec' is necessary

update-2020-7-24

add hint when install shapely on win

Add common code to reduce code duplication

Fixocr