Cache through listener instead of keywords

[Lakitna]

Instead of adding keywords to the beginning and ending of a keyword, cache by listener instead.

How this could work:

***keyword***
I Am Cached
    [Tags]    cached:3600
    # Keyword implementation

The listener would cache the output of this keyword using the input arguments as key. The value would expire after 3600 seconds.

Pro

Very easy to implement

Con

Hard to figure out what's happening when you're not familiar with caching.