User option to specify the merging of a specified flynn with another
flynn i.e. remove a particular boundary
Added merge.h, changed merge.elle.cc and merge.main.cc
split:
Viscosity:
Use F_ATTRIB_NAME in file reading and ATTRIB_NAME in code for
setting/getting.
sub_gg:
Fixed odd parameter name in declaration of CalcMisorientationEuler