Fix compilation with hybridization enum.

Also fix issue with SP2 hydrogen addition - now properly planar
including C(=O)O case is insured to be trans

Change-Id: I4feca56d3c50163f4fa1cdae5c84f379dece0e11
Merge topic 'FIX_hydrogen_compile' into master

d8f21e88 Fix compilation with hybridization enum.