Oftest

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added:
- path_logs get all log.* in folder

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added:
- log files are copied in logs folder

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added:
- success to run_case, run_reset_case, clean_case
- copy_log_files

::
accessible with
run_reset_case.success

add copy_log_files() copy files to os.path.join("logs",current_test())
use case
if (not run_reset_case.success)
oftest.copy_log_files()

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added exit code to run_case, run_reset_case, clean_case
accessible with:
c_mod.meta_data['return_value']

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added expected_results: loads a results in csv format and return the results in
a pandas DataFrame:

test = oftest.expected_results([1,2],('isoAlpha',32))
test['err_shape']

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update documentation and added docstrings