Temporally Ordered Sub columns in a SuperColumnFamily
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                 Key: CASSANDRA-334
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-334
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Michael Koziarski


Since the switch to typed column names and CompareSubcolumnsWith we no longer 
have a simple way to order entries in a super column / column family by their 
creation time.  This makes things like 'timelines' harder to implement.

After discussions on IRC / twitter it appears we could achieve this with a new 
comparator for UUIDTypes which checks their temporal order before just falling 
back on their lexical order.

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