get rid of less valuable columns

[eostermueller]

Here are the current header column names:
LKY% (B-INC (JMH (I-INC (R-INC BYTES INSTANCES NUM CLASS

Some of these aren't very valuable, so here are proposed changes:

• Because (JMH is the same for each row, this needs to be moved up above the column headers.
• (I-INC and (R-INC need to just go away, b/c they provide too little bang for the buck. Not much help in finding a leak, too much effort to explain/document.
• (B-INC must stay, because users will need to understand how it contributes to LKY%.