add solutions

zz-solutions/02-SplineInterpolator/SplineInterpolator/hdl/offsetToUnsigned_masterVersion.vhd

@@ -0,0 +1,7 @@
+ARCHITECTURE masterVersion OF offsetToUnsigned IS
+
+BEGIN
+
+  unsignedOut <= not(signedIn(signedIn'high)) & unsigned(signedIn(signedIn'high-1 downto 0));
+
+END ARCHITECTURE masterVersion;