add Strings interface can return []string sep by ;

Example:
peers = one;Two;Three

@@ -6,8 +6,9 @@ import (
 
 // ConfigContainer defines how to get and set value from configuration raw data.
 type ConfigContainer interface {
-	Set(key, val string) error // support section::key type in given key when using ini type.
-	String(key string) string  // support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.
+	Set(key, val string) error   // support section::key type in given key when using ini type.
+	String(key string) string    // support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.
+	Strings(key string) []string //get string slice
 	Int(key string) (int, error)
 	Int64(key string) (int64, error)
 	Bool(key string) (bool, error)

@@ -25,6 +25,10 @@ func (c *fakeConfigContainer) String(key string) string {
 	return c.getData(key)
 }
 
+func (c *fakeConfigContainer) Strings(key string) []string {
+	return strings.Split(c.getData(key), ";")
+}
+
 func (c *fakeConfigContainer) Int(key string) (int, error) {
 	return strconv.Atoi(c.getData(key))
 }

@@ -146,6 +146,11 @@ func (c *IniConfigContainer) String(key string) string {
 	return c.getdata(key)
 }
 
+// Strings returns the []string value for a given key.
+func (c *IniConfigContainer) Strings(key string) []string {
+	return strings.Split(c.String(key), ";")
+}
+
 // WriteValue writes a new value for key.
 // if write to one section, the key need be "section::key".
 // if the section is not existed, it panics.

@@ -19,6 +19,7 @@ copyrequestbody = true
 key1="asta"
 key2 = "xie"
 CaseInsensitive = true
+peers = one;two;three
 `
 
 func TestIni(t *testing.T) {
@@ -78,4 +79,11 @@ func TestIni(t *testing.T) {
 	if v, err := iniconf.Bool("demo::caseinsensitive"); err != nil || v != true {
 		t.Fatal("get demo.caseinsensitive error")
 	}
+
+	if data := iniconf.Strings("demo::peers"); len(data) != 3 {
+		t.Fatal("get strings error", data)
+	} else if data[0] != "one" {
+		t.Fatal("get first params error not equat to one")
+	}
+
 }

@@ -116,6 +116,11 @@ func (c *JsonConfigContainer) String(key string) string {
 	return ""
 }
 
+// Strings returns the []string value for a given key.
+func (c *JsonConfigContainer) Strings(key string) []string {
+	return strings.Split(c.String(key), ";")
+}
+
 // WriteValue writes a new value for key.
 func (c *JsonConfigContainer) Set(key, val string) error {
 	c.Lock()

@@ -5,6 +5,7 @@ import (
 	"io/ioutil"
 	"os"
 	"strconv"
+	"strings"
 	"sync"
 
 	"github.com/beego/x2j"
@@ -72,6 +73,11 @@ func (c *XMLConfigContainer) String(key string) string {
 	return ""
 }
 
+// Strings returns the []string value for a given key.
+func (c *XMLConfigContainer) Strings(key string) []string {
+	return strings.Split(c.String(key), ";")
+}
+
 // WriteValue writes a new value for key.
 func (c *XMLConfigContainer) Set(key, val string) error {
 	c.Lock()

@@ -7,6 +7,7 @@ import (
 	"io/ioutil"
 	"log"
 	"os"
+	"strings"
 	"sync"
 
 	"github.com/beego/goyaml2"
@@ -117,6 +118,11 @@ func (c *YAMLConfigContainer) String(key string) string {
 	return ""
 }
 
+// Strings returns the []string value for a given key.
+func (c *YAMLConfigContainer) Strings(key string) []string {
+	return strings.Split(c.String(key), ";")
+}
+
 // WriteValue writes a new value for key.
 func (c *YAMLConfigContainer) Set(key, val string) error {
 	c.Lock()