Add a local device to the map metadata to allow conversion (and
automatic object creation) to BACnet.

Given an object-type and a property-identifier, return a map with
the :type and if it's a :sequence.

Encode an object map into a sequence of bacnet4j property-values.
Remove-keys can be used to remove read-only properties before
sending a command.

Take an object-map (a map of properties and values) and encode the
values (not the properties) into their corresponding bacnet4j type. For
example, a clojure number "1" might be encoded into a real, or
into an unisgned integer, depending on the object.

Encode the property value depending on what type it should be given
the object.

A type can be specified when required (proprietary properties) by
using the function `force-type'.

Associate the value with a specific type. Use only before
encoding.

Ex: {:some-property (force-type "some-value" :character-string)}

Find the object type in an object-map (either from
the :object-type, or in the :object-identifier).

Return a list or properties. `option' should
be :required, :optional, :sequence or :all.

Given an object type, return the properties it should have, and if
they are :required, :optional, or :sequence.