Improved documentation.

README.md

@@ -13,7 +13,7 @@ go get gopkg.in/yaml.v3
 1. Install **config** library:
 
 ```sh
-go get github.com/eschao/config
+git@git.mousesoft.ru:ms/config.git
 ```
 
 ## Usage
@@ -41,6 +41,7 @@ Like JSON, Yaml, **config** uses tags to define configurations:
 * int8, int16, int, int32, int64
 * uint8, uint16, uint, uint32, uint64
 * float32, float64
+* time.Duration
 * slice type. e.g: []string, []int ...
   
 #### 2. Defines **default** values
@@ -294,6 +295,22 @@ Then, you can parse as below:
   // error handling
 }
 
+cmd := config.NewCLI("")
+if err := cmd.Init(&dbConfig); err != nil {
+  // error handling
+}
+
+// capture cli flags
+args := cmd.Capture(os.Args)
+
+// parse cli flags of application, urfave for example
+flagSet.Parse(args)
+
+// parse captured cli flags of config
+if err := cmd.Parse(cmd.Args); err != nil {
+  // error handling
+}
+
 // parse configuration file from command line
 err := config.ParseConfig(&dbConfig, "c")