Implement a bridge to call Sointu from Go language.

The main interface is render_samples function, which renders several samples in one call,
to limit the number of calls from Go to C. This is compiled into a library, which is then
linked and called from bridge.go.

.gitignore

@@ -18,4 +18,9 @@ build/
 old/
 
 # VS Code
-.vscode/
+.vscode/
+
+# project specific
+# this is autogenerated from bridge.go.in
+bridge/bridge.go
+