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/gen.go

@@ -12,7 +12,6 @@ import (
 	"github.com/tal-tech/go-zero/tools/goctl/util"
 	"github.com/tal-tech/go-zero/tools/goctl/util/console"
 	"github.com/tal-tech/go-zero/tools/goctl/util/stringx"
-	"github.com/tal-tech/go-zero/tools/goctl/util/templatex"
 )
 
 const (
@@ -119,7 +118,7 @@ type (
 )
 
 func (g *defaultGenerator) genModel(in parser.Table, withCache bool) (string, error) {
-	t := templatex.With("model").
+	t := util.With("model").
 		Parse(template.Model).
 		GoFmt(true)