Add complete rework of scheme language and conversion to binary representation

spec/ujs-bin/ujsbin-base.ujs

+# Binary representation of an ujo scheme
+
+module ujsbin_base
+    : doc """Base types for ujs binary format.""";
+
+
+container = int32 
+    : in (
+        48 : doc "list",
+        49 : doc "map",
+        50 : doc "table"
+) : doc "Container type IDs";
+
+atomic = int32
+    : in (
+        1 : doc "float64",
+        2 : doc "float32",
+        3 : doc "float16",
+        4 : doc "string"
+    ) : doc "atomic type IDs";
+
+
+type = variant of [
+    container,
+    atomic
+];
+
+types = list of type;
+
+# constraint definitions
+
+notnull = list [
+    int8 : doc "constraint id = 1"
+         : in (1),
+    bool : doc "True means null is not a valid value"
+] : doc "If true the value can't be null";
+
+constraint = variant of [notnull];
+constraints = list of constraint;
+
+# defining a data field
+typedef = list [
+    types       : name TypeIDs : doc "A list of possible basic types",
+    constraints : name Constraints : doc "constraint defintion for this type" 
+];
+
+listdef = list of typedef;
+