Allow SMARTS expressions of the form [h0] and [!h0] analogous to [H0] and [!H0]. Previously this was not possible to null handling semantics.
Make sure array index is now called out of range. We only sort by low atomic number elements to minimise ring double bonds flipping between.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>
Add info on creating a Jar of sources.
Tell eclipse to run JavaCC on import (i.e. before the module is built).
Merge branch 'master' of github.com:cdk/cdk
Unit tests for bug reports by Yannick on the cdk-user@ mailing list

Change-Id: I20cdb8e7f9c0c25be4fbcf344e3dddfaf4e93794
Signed-off-by: John May <john.wilkinsonmay@gmail.com>