wip: phosphates fuse to become children of a new PhosphateGroup
CompoundNodes can now be combined into a parent.
PhosphateGroups add a 3rd Phosphate to become full.
Random nucleobase init.
Nucleobases pair up.
Nucleobase pairs bind with PhosphateGroups. TODO: bind nucleotides together.
Attract Nucleotides (pairs actually) to center.
DNA compounds die after 5 seconds unless they build.
Doubled time for removing unlucky compounds.
Increased compound size.
Fixed touch bug.
Added labels to compounds.