add testing framework

tests/outputs/Nutil_linear_flat/Nutil_linear_flat.nut

-type = Quantifier
-name = 
-analysis_type = QUINT
-quantifier_input_dir = C:/Users/sharoncy/Documents/GitHub/PyNutil/test_data/PyTest_linear_seg/segmentations
-quantifier_atlas_dir = C:/Users/sharoncy/Documents/GitHub/PyNutil/test_data/PyTest_linear_seg/flat_files
-label_file = Allen Mouse Brain 2017
-custom_label_file = 
-xml_anchor_file = C:/Users/sharoncy/Documents/GitHub/PyNutil/test_data/PyNutil_testdataset_linear.json
-quantifier_output_dir = C:/Users/sharoncy/Documents/GitHub/PyNutil/outputs/Nutil_linear_flat
-output_report = All
-extraction_color = 0,0,0,255
-object_splitting = Yes
-object_min_size = 1
-global_pixel_scale = 1
-quantifier_pixel_scale_unit = pixels
-use_custom_masks = No
-custom_mask_directory = 
-custom_mask_color = 255,255,255,255
-output_report_type = CSV
-custom_region_type = Default
-custom_region_file = 
-coordinate_extraction = All
-coordinate_single_point = No
-pixel_density = 1
-display_label_id = No
-output_region_id = Yes
-pattern_match = _sXXX
-files = 
-nutil_version = v1.0.0
-nutil_version = v1.0.0
-nutil_version = v1.0.0