ce_functions.cc: Added a new version of get  get_attribute_double_value() that takes a vector of strings and returns the value of the first attribute found in that vector. Also cleaned up the memory use in the linear_scale function so that function no longer leaks the new template variable. This was part of the fix for #660 (See also the checkin for Clause.cc from today).
ce_functions.cc: Added a new version of get 
get_attribute_double_value() that takes a vector of strings
and returns the value of the first attribute found in that
vector. Also cleaned up the memory use in the linear_scale
function so that function no longer leaks the new template
variable. This was part of the fix for #660 (See also the
checkin for Clause.cc from today).

OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap