fair performance test + robust script

[hh-h]

jsonschema can be compiled as well, added test case
Also, some PEP8 improvements in performance script, plus there's no need to create temp folder

test run example

$ make performance
Number: 1000
fast_compiled        valid      ==>  0.0464646
fast_compiled        invalid    ==>  0.0030227
fast_file            valid      ==>  0.0461219
fast_file            invalid    ==>  0.0030608
fast_not_compiled    valid      ==> 11.4627202
fast_not_compiled    invalid    ==>  2.5726230
jsonschema           valid      ==>  7.5844927
jsonschema           invalid    ==>  1.9204665
jsonschema_compiled  valid      ==>  0.6938364
jsonschema_compiled  invalid    ==>  0.0359244
jsonspec             valid      ==>  9.0715843
jsonspec             invalid    ==>  2.1650488
validictory          valid      ==>  0.4874793
validictory          invalid    ==>  0.0232244

feel free to update with your numbers here: https://github.com/horejsek/python-fastjsonschema/blob/master/fastjsonschema/__init__.py#L43

[horejsek]

Thanks 👍