Added mappings for Mo

Change-Id: I904d7e87778ef1026689070f01850401897b5678
Added rudimentary detection of the chromium atom types

Change-Id: I4a09a271e6b683b054b71975cb0f8b594597aec1
Added rudimentary detection of the Co.oh atom type

Change-Id: I2379c9a886f731f72c0e4dfeb4d3511334e57291
According to me example data, a nitro nitrogen is N.pl3

Change-Id: Iec32f8615e49a484921bc3dfb0f3540780f0c3da