Get the metric from the annotated component.
Remove broken metrics not shown on the web UI.
Merge pull request #81 from eric-wu/upgrade

Perf testing -- removing @Async.
Merge pull request #80 from eric-wu/name-anno

Clean metrics
add new method to calculate percentage
add tests
remove unnecessary parentheses
remove print statements
Merge pull request #82 from kimyen/develop

add new method to calculate percentage