Scalameter for java code

Please note that I've worked on version forked from http://axel22.github.com/scalameter/.
Also, I have a NullPointerException at the end of regression tests, even with scala code coming from HTMLReporter.scala at line 167. I have not been able to determine if it comes from my code, or my computer...
This does not include all the keys that currently exist, and is not maintainable - if somebody adds new keys to the `Keys` class, there is no guarantee that they will end up here.

A proper approach would be to have java developers just type string values for the keys, and those strings are parsed to be matched with proper keys from the `Keys` object. For example:

    public static KV[] config = new KV[] {
      new KV("exec.benchRuns", 10),
      new KV("reports.colors", false)
    }

Also, we've said that users should use an array field as above to set the custom configuration.
It's much less verbose than creating a `HashMap`. Any reason for the change?