rpc service generation (#26)

* add execute files

* add protoc-osx

* add rpc generation

* add rpc generation

* add: rpc template generation

* update usage

* fixed env prepare for project in go path

* optimize gomod cache

* add README.md

* format error

* reactor templatex.go

* remove waste code

tools/goctl/model/sql/gen/new.go

@@ -2,11 +2,11 @@ package gen
 
 import (
 	"github.com/tal-tech/go-zero/tools/goctl/model/sql/template"
-	"github.com/tal-tech/go-zero/tools/goctl/util/templatex"
+	"github.com/tal-tech/go-zero/tools/goctl/util"
 )
 
 func genNew(table Table, withCache bool) (string, error) {
-	output, err := templatex.With("new").
+	output, err := util.With("new").
 		Parse(template.New).
 		Execute(map[string]interface{}{
 			"withCache":             withCache,