- Fixed a bug in convertUnits() which prevented the conversion working
in the case of input fluxes in ph/cm/s/keV
- In rebinChannels set the grouping identically to 0 rather than 1 for
consistency with the standard since a GROUPING keyword will be written.
- Changed setting of output quality to be bad if either any input
channel making the bin is bad or if phafile grouping is being used
any channel in the grouping pha is bad.