There is a new procedure merge() to merge the content of 2 diicts into
a third one. This procedure is defined outside of the t_dict protected
type.
Also a new get() function returning the data as std_logic_vector.
is added. It is needed to save the data in a unconstrained access type
which is used inside the merge() procedure. This get() function is
public. It can be used when no error return value is needed as you
get with the get() procedure. Instead an assertion is triggered when
the given key isn't found.