add pytest.ini with flags to show skipped test reasons, revert tox.ini
add pytest.ini with flags to show skipped test reasons, revert tox.ini

glyph/cryptography,Ayrx/cryptography,skeuomorf/cryptography,dstufft/cryptography,bwhmather/cryptography,Lukasa/cryptography,dstufft/cryptography,bwhmather/cryptography,kimvais/cryptography,skeuomorf/cryptography,Hasimir/cryptography,bwhmather/cryptography,Lukasa/cryptography,Ayrx/cryptography,sholsapp/cryptography,dstufft/cryptography,skeuomorf/cryptography,skeuomorf/cryptography,sholsapp/cryptography,kimvais/cryptography,Ayrx/cryptography,bwhmather/cryptography,sholsapp/cryptography,Hasimir/cryptography,Hasimir/cryptography,Hasimir/cryptography,Ayrx/cryptography,dstufft/cryptography,sholsapp/cryptography,Lukasa/cryptography,kimvais/cryptography,dstufft/cryptography,glyph/cryptography,kimvais/cryptography