added migrated 2.x add-ons

Signed-off-by: Kai Kreuzer <kai@openhab.org>

bundles/org.openhab.transform.map/README.md

@@ -0,0 +1,44 @@
+# Map Transformation Service
+
+Transforms the input by mapping it to another string. It expects the mappings to be read from a file which is stored under the `transform` folder. 
+
+This file should be in property syntax, i.e. simple lines with "key=value" pairs. 
+The file format is documented [here](https://docs.oracle.com/javase/8/docs/api/java/util/Properties.html#load-java.io.Reader-).
+To organize the various transformations one might use subfolders.
+
+A default value can be provided if no matching entry is found by using "=value" syntax
+
+## Example
+
+transform/binary.map:
+
+```properties
+key=value
+1=ON
+0=OFF
+ON=1
+OFF=0
+=default
+```
+
+| input      | output    |
+|------------|-----------|
+| `1`        | `ON`      |
+| `OFF`      | `0`       |
+| `key`      | `value`   |
+| `anything` | `default` |
+
+## Usage as a Profile
+
+The functionality of this `TransformationService` can be used in a `Profile` on an `ItemChannelLink` too.
+To do so, it can be configured in the `.items` file as follows:
+
+```java
+String <itemName> { channel="<channelUID>"[profile="transform:MAP", function="<filename>", sourceFormat="<valueFormat>"]}
+```
+
+The mapping filename (within the `transform` folder) has to be set in the `function` parameter.
+The parameter `sourceFormat` is optional and can be used to format the input value **before** the transformation, i.e. `%.3f`.
+If omitted the default is `%s`, so the input value will be put into the transformation without any format changes.
+
+Please note: This profile is a one-way transformation, i.e. only values from a device towards the item are changed, the other direction is left untouched.