add guide and plugin

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+
+## How to get verbose command-line arguments info?
+
+Get the help info of the main command.
+
+```bash
+$ xmake [-h|--help]
+``` 
+
+Get the help info of the configuration command.
+
+```bash
+$ xmake f [-h|--help]
+``` 
+
+Get the help info of the givent action or plugin command.
+
+```bash
+$ xmake [action|plugin] [-h|--help]
+``` 
+
+For example:
+
+```bash
+$ xmake run --help
+``` 
+
+## How to suppress all output info?
+
+```bash
+$ xmake [-q|--quiet]
+```
+
+## How to do if xmake fails?
+
+Please attempt to clean configuration and rebuild it first.
+
+```bash
+$ xmake f -c
+$ xmake
+```
+
+If it fails again, please add `-v` or `--verbose` options to get more verbose info.
+
+For exmaple: 
+
+```hash
+$ xmake [-v|--verbose] 
+```
+
+And add `--backtrace` to get the verbose backtrace info, then you can submit these infos to [issues](https://github.com/xmake-io/xmake/issues).
+
+```bash
+$ xmake -v --backtrace
+```
+
+## How to see verbose compiling warnings?
+
+```bash
+$ xmake [-w|--warning] 
+```
+
+## How to scan source code and generate xmake.lua automaticlly
+
+You only need run the following command:
+
+```bash
+$ xmake
+```
+
+xmake will scan all source code in current directory and build it automaticlly. 
+
+And we can run it directly.
+
+```bash
+$ xmake run
+```
+
+If we only want to generate xmake.lua file, we can run:
+
+```bash
+$ xmake f -y
+```
+
+If you want to known more information please see [Scan source codes and build project without makefile](https://tboox.org/2017/01/07/build-without-makefile/)
+