Separate the implicit/explicit versions of butan-2-ol between files.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>
Test for encoding tetrahedral stereo elements - we try configuring different elements and compare the to the hash codes generated for 2D representations (i.e. MDL).

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>
Utility method for defining parities with a set value.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>
A tetrahedral element encoder factory for encoding the existing CDK stereo element - ITetrahedralChirality.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>
Use the encoder when chiral() hash codes are wanted.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>
Missing license headers.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>