updated README

Author: saniales

README.adoc

@@ -17,11 +17,36 @@ It implements all functions provided by web version of Arduino Create.
 A general call is `arduino [COMMAND] [options]`
 To see the full list of commands, call `arduino help [COMMAND]`, arduino [COMMAND] -h` or `arduino [COMMAND] --help`
 
+output from help command:
+[source, bash]
+----
+Arduino Create Command Line Interface (arduino-cli)
+
+Usage:
+  arduino [flags]
+  arduino [command]
+
+Available Commands:
+  core        Arduino Core operations
+  help        Help about any command
+  lib         Arduino commands about libraries
+  version     Shows version Number of arduino
+
+Flags:
+      --config string        config file (default is $HOME/.arduino.yaml)
+      --format string        the output format, can be [text|json] (default "text")
+      --generate-docs        generates the docs for the CLI and puts it in docs folder
+  -h, --help                 help for arduino
+  -v, --verbose count[=-1]   enables verbose output (use more times for a higher level)
+
+Use "arduino [command] --help" for more information about a command.
+----
+
 == Contribution
 
 To contribute to this project:
 
-. `git clone` this repository
-. Create a new branch with the name `feature-to-implement` or `bug-to-fix`
-. Code your contribution and push to your branch
-. Ask a Pull Request
+. `git clone` this repository.
+. Create a new branch with the name `feature-to-implement` or `bug-to-fix`.
+. Code your contribution and push to your branch.
+. Make a PR (Pull Request).