add doc.go

doc.go

@@ -0,0 +1,36 @@
+/*
+
+## Features:
+
+	Fully support PHP5 and PHP7 syntax
+	Abstract syntax tree representation
+	Traversing AST
+
+## Install
+
+	go get github.com/z7zmey/php-parser
+
+Example
+
+	package main
+
+	import (
+		"bytes"
+
+		"github.com/z7zmey/php-parser/php7"
+		"github.com/z7zmey/php-parser/visitor"
+	)
+
+	func main() {
+		src := bytes.NewBufferString(`<? echo "Hello world";`)
+		nodes, comments, positions := php7.Parse(src, "example.php")
+
+		visitor := visitor.Dumper{
+			Indent:    "",
+			Comments:  comments,
+			Positions: positions,
+		}
+		nodes.Walk(visitor)
+	}
+*/
+package main // import "github.com/z7zmey/php-parser"