coded: Permit both untyped and typed substitutions

Coded functionality now supports basic un-typed substitutions from the
surrounding dictionary. For example:

    value 1.2345;

    #codeExecute
    {
        scalar s = $value;
        ...
    };

It also now supports the more functional typed substitutions, such as:

    direction (1 0 0);

    #codeExecute
    {
        vector v = $<vector>direction;
        ...
    };

These substitutions are now possible in all code blocks. Blocks with
access to the dictionary (e.g., #codeRead) will do a lookup which will
not require re-compilation if the value is changed. Blocks without
access to the dictionary will have the value directly substituted, and
will require recompilation when the value is changed.

etc/codeTemplates/dynamicCode/codedFunction1Template.C

@@ -24,6 +24,7 @@ License
 \*---------------------------------------------------------------------------*/
 
 #include "codedFunction1Template.H"
+#include "read.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //