generate plugin clients via template

Signed-off-by: Brian Goff <cpuguy83@gmail.com>

plugins/pluginrpc-gen/fixtures/foo.go

@@ -0,0 +1,35 @@
+package foo
+
+type wobble struct {
+	Some      string
+	Val       string
+	Inception *wobble
+}
+
+type Fooer interface{}
+
+type Fooer2 interface {
+	Foo()
+}
+
+type Fooer3 interface {
+	Foo()
+	Bar(a string)
+	Baz(a string) (err error)
+	Qux(a, b string) (val string, err error)
+	Wobble() (w *wobble)
+	Wiggle() (w wobble)
+}
+
+type Fooer4 interface {
+	Foo() error
+}
+
+type Bar interface {
+	Boo(a string, b string) (s string, err error)
+}
+
+type Fooer5 interface {
+	Foo()
+	Bar
+}