Add command line parameter documentation

README.md

@@ -3,6 +3,39 @@
 This daemon allows to set up the wireless network using a bluetooth LE connection. The daemon will automatically start a bluetooth low energy server 
 if the system is currently not connected to any network. Once the system is connected, the daemon will shutdown the bluetooth server. 
 
+# Command line parameters
+
+    $ nymea-network-manager --help
+    Usage:nymea-networkmanager [options]
+    
+    This daemon allows to configure a wifi network using a bluetooth low energy connection.
+    
+    Copyright © 2018 Simon Stürz <simon.stuerz@guh.io>
+    
+    Options:
+      -h, --help                             Displays this help.
+      -v, --version                          Displays version information.
+      -d, --debug                            Enable more debug output.
+      -a, --advertise-name <NAME>            The name of the bluetooth server.
+                                             Default "nymea".
+      -p, --platform-name <NAME>             The name of the platform this daemon
+                                             is running. Default "nymea-box".
+      -t, --timeout <SECONDS>                The timeout of the bluetooth server.
+                                             Minimum value is 10. Default "60".
+      -m, --mode <offline | always | start>  Run the daemon in a specific mode.
+                                             Default "offline".
+                                             - offline: this mode starts the
+                                             bluetooth server once the device is
+                                             offline and not connected to any LAN
+                                             network.
+                                             - always: this mode enables the
+                                             bluetooth server as long the
+                                             application is running.
+                                             - start: this mode starts the bluetooth
+                                             server for 3 minutes on start and shuts
+                                             down after a connection.
+    
+    
 
 # Bluetooth GATT profile
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