createSubentHandler: Create Subentry Handler
In gschnabel/talysExforMapping: Map Data between TALYS and EXFOR

Create Subentry Handler

1	createSubentHandler(subentHandlerList)

List with functions:

getName(): returns signature of the general handler
getInfo(): returns additional information about handler
canMap(subent): returns a bool indicating whether subent can be mapped
needs(subent): returns data table with extended output specification, see ...
map(subent): TODO