This patch updates our checkstyle rules to accept zero or more spaces on lines 3, 7, and 9 of our standard file headers.  This should address IntelliJ's removal of superfluous whitespace.

Review by: ecc, tobyr



git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@490 8db76d5a-ed1c-0410-87a9-c151d255dfc7