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README.md

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+# How to build?
+
+**1. clone**
+
+  ```bash
+  git clone https://github.com/peter-iakovlev/Telegram.git
+  ```  
+
+**2. submodule**
+
+* do
+  ```bash
+  vi .git/config
+  ```
+
+* change the file path like
+  ```bash
+  [submodule "submodules/MtProtoKit"]
+    active = true
+    url = https://github.com/peter-iakovlev/MtProtoKit.git
+  [submodule "thirdparty/SSignalKit"]
+    active = true
+    url = https://github.com/peter-iakovlev/Signals.git
+  ```
+
+* And than
+  ```bash
+  git submodule update --init --recursive
+  ```
+
+**3. Build. If it shows ../../config.h file not found.**
+* Creat a new head file named config（Telegraph->New File->Header File）
+* Write
+  ```bash
+  #define SETUP_API_ID(apiId) apiId = ******;
+  #define SETUP_API_HASH(apiHash) apiHash= @"******";
+  ```
+
+**4. Congratulation!**