Style modifications

I'd like to suggest a few changes to the checkstyle.xml doc. 

1. My team has recently decided we want to try to limit method bodies to 15 lines long. Shorter methods are easier to read and also discourage too much unrelated stuff happening in a given method.
2. I like google's [style guide rules for whitespace](http://google-styleguide.googlecode.com/svn/trunk/javaguide.html#s4.6.2-horizontal-whitespace) around commas and other tokens/operators/keywords. I've incorporated their whitespace rules pretty much verbatim.

Do these changes look reasonable? @palecio-xumak , I'm guessing this is your call, but let me know if I should ask someone else instead.