Added lower-level file reading with pybel.ob to allow setting the OBConversion "b" option. Normal pybel.readfile() is still kept as a fallback.
Added lower-level file reading with pybel.ob to allow setting the OBConversion "b" option. Normal pybel.readfile() is still kept as a fallback.

FlorianRhiem/mogli,FlorianRhiem/mogli,sciapp/mogli,sciapp/mogli