Create readme.md

Signed-off-by: Tobias Bräutigam <[email protected]>

Author: peuter

addons/binding/org.openhab.binding.ipp/README.md

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+# IPP Binding
+
+This binding integrates printers, which implement the Internet Printing protocol (IPP). This is the successor of the CUPS binding.
+The main purpose is to check if there are waiting print jobs on a printer, which can be switched on in this case.
+
+## Supported Things
+
+The binding has been tested against a CUPS Server (which implements the Internet Printing Protocol). 
+So all printers in a CUPS envorinment should work fine. Many network printers also use IPP, 
+but there are many differencies on which parts of IPP are supported, is is not guaranteed, that every printer will work.
+
+## Discovery
+
+The printers are discovered through mDNS in the local network. As mentioned before: a printer may be discoverable but not 
+usable by the binding.
+
+
+## Thing Configuration
+
+
+
+## Channels
+
+All devices support some of the following channels:
+
+| Channel Type ID | Item Type    | Description  |
+|-----------------|------------------------|--------------|----------------- |------------- |
+| jobs | Number       | Total number of print jobs on the printer |
+| waitingJobs | Number       | Number of waiting print jobs on the printer |
+| doneJobs | Number       | Number of completed print jobs on the printer |
+## Full Example