Golang bindings initial working version(#534)

* WIP

* Fix includes

* Try to fix linking issues

* Refinements

* allow to load MPT and llama models too

* cleanup, add example, add README

gpt4all-bindings/golang/binding.h

@@ -0,0 +1,22 @@
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdbool.h>
+
+void* load_mpt_model(const char *fname, int n_threads);
+
+void* load_llama_model(const char *fname, int n_threads);
+
+void* load_gptj_model(const char *fname, int n_threads);
+
+void gptj_model_prompt( const char *prompt, void *m, char* result, int repeat_last_n, float repeat_penalty, int n_ctx, int tokens, int top_k,
+                            float top_p, float temp, int n_batch,float ctx_erase);
+
+void gptj_free_model(void *state_ptr);
+
+extern unsigned char getTokenCallback(void *, char *);
+
+#ifdef __cplusplus
+}
+#endif