add morphisms

- unicode
- value delimited seq
- zigzag encoding (still lacking any way to get to signed integer yet'..)

morphisms/zigzag.morphism-base

@@ -0,0 +1,26 @@
+```
+```
+
+morph_i64_as_twos_complement_to_zigzag ()
+    ℤ ~ x86.Int64
+--> ℤ ~ ZigZagInt ~ ℕ ~ x86.UInt64
+```
+    if( *src >= 0 ) {
+        *dst = (2 * (uint64_t)*src)
+    } else {
+        *dst = (2 * (uint64_t)(- *src)) - 1;
+    }
+
+    return 0;
+```
+
+morph_i64_as_zigzag_to_twos_complement ()
+    ℤ ~ ZigZagInt ~ ℕ ~ x86.UInt64
+--> ℤ ~ x86.Int64
+```
+    if( *src % 2 == 0 ) {
+        *dst = *src / 2;
+    } else {
+        *dst = - ((*src+1) / 2);
+    }
+```