Added a warning in javadoc of contains(Envelope, boolean) and intersects(Envelope, boolean) methods
that their API may change (see SIS-172 for this issue). Users are advised to use contains(Envelope)
and intersects(Envelope) instead for API stability.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1583772 13f79535-47bb-0310-9956-ffa450edef68