Add an AbstractType anytype which stores meta data on a per column basis
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                 Key: CASSANDRA-3281
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3281
             Project: Cassandra
          Issue Type: New Feature
            Reporter: Edward Capriolo
            Priority: Minor


A pet project of mine is an AbstractType for Cassandra that stores metadata of 
the type in the column. https://github.com/edwardcapriolo/Cassandra-AnyType

I described my use case any my design decisions here. 
https://github.com/edwardcapriolo/Cassandra-AnyType/blob/master/README . The 
biggest cases were needing to support null and '' as keys, column names, and 
column values, however I also think the technique used to serialize Java 
Objects as JSON but compare as a Java object is novel. 

Side node: (The AbstractType interface has changed multiple times between 
0.6.X, 0.7.X, and 1.0.0-beta. I hope it stabilizes! ) 

If people would like AnyType (or parts of it ) incorporated into Cassandra that 
would be great. I am willing to tweak change it based on other peoples ideas.

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