Fix package_data to include spectral database unit test files.

Author: tboggs

setup.py

@@ -31,11 +31,16 @@
       download_url='https://github.com/spectralpython/spectral/releases/latest',
       packages=['spectral', 'spectral.algorithms', 'spectral.database',
                 'spectral.graphics', 'spectral.io', 'spectral.tests',
-                'spectral.tests.data', 'spectral.tests.data.ecostress',
-                'spectral.tests.data.usgs', 'spectral.utilities'],
-      package_data={'spectral.tests.data': ['*.spc'],
-                    'spectral.tests.data.ecostress': ['*.txt'],
-                    'spectral.tests.data.usgs': ['*.txt']},
+                'spectral.utilities'],
+      package_data={'spectral.tests': ['data/*.spc',
+                                       'data/ecostress/*.txt',
+                                       'data/usgs/ASCIIdata/liba/*.txt',
+                                       'data/usgs/ASCIIdata/liba/ChapterB_b0/*.txt',
+                                       'data/usgs/ASCIIdata/liba/ChapterD_d0/*.txt',
+                                       'data/usgs/ASCIIdata/libc/*.txt',
+                                       'data/usgs/ASCIIdata/lib/errorbars/*.txt',
+                                       'data/usgs/ASCIIdata/libc/ChapterB_b0/*.txt',
+                                       'data/usgs/ASCIIdata/libc/ChapterD_d0/*.txt']},
       platforms=['Platform-Independent'],
       install_requires=['numpy'],
       classifiers=['Development Status :: 4 - Beta',