Squashed 'rbkit-charts/' changes from 95896ff..a210949

a210949 Merge pull request #13 from code-mancers/charts-heap-mem-sizes-fix
b2cce62 remove timestamp from tooltip and change megabytes from "mb" to "MB"
f68f388 improve tooltip for gc chart stats by specifying 'ms'
3c91ed1 improve tooltip for heap sizes stats by specifying 'mb'
b91acd7 improve tooltip for object stats by representing in 'k's, ie in 1000's
6ffa14a move colgroup to top of the gc stats table
3255225 change the order of mem size and heap size according to labels

git-subtree-dir: rbkit-charts
git-subtree-split: a210949df3e518ae95ddab343564d81fbb5cc893
Merge commit '56868b14e836da02eb5a5cf8cb08fa608fdf6e96'