The TriggerFeed processor documentation needs better examples

At the time of writing the documentation on the TriggerFeed processor at kylo.io is ambiguous and insufficient. There are several problems:

1. it is not sufficiently clear that "Matching Execution Context Keys" is a list of prefixes for properties available in the global set of "execution context data" in the triggering feed

2. it is not stated that the chunk-of-json the dependent feed receives will have the parent "execution context data" for the triggering instance in the "latestFeedJobExecutionContext" leaf

3. the example JSON provided toward the bottom of the feed has no values in the "executionContext", so it is not clear what the format of the data is

4. there really should be an example JSONPath fragment corresponding to extracting a value from "latestFeedJobExecutionContext.executionContext"

5. it's not clear whether the example pointed at (a link to data_confidence_invalid_records.zip) is a NiFi template, or a kylo template, or how to examine the example.