Function uniqToOrder( uniq )

Description:
Extracts the HEALPix order from a UNIQ-encoded integer as used in MOC encoding.

If the supplied value is not a legal UNIQ integer, behaviour is undefined.

Parameters:
uniq (long integer)
uniq-encoded value
Return Value (integer):
HEALPix order
Signature:
int uniqToOrder(long)