Miscellaneous minor patches: javadoc typos, javac warnings, etc.

[Martin Desruisseaux]

Hello all

It took me a while, but I finally posted the patches that I submitted last month 
as webrev pages. I tried to split them according different groups (core, 
Java2D...) to the best of my knowledge:

http://webrev.geomatys.com/

I also signed the Oracle Contributor Agreement (OCA) and send it by email to 
oracle-ca_us at oracle.com.

In the core classes, most patches can be grouped in two categories:

  * Documentation fixes (Class, Attributes)
  * Avoid creation of unnecessary temporary objects (AssertionError, Float, Double)


The only real bug fix is in Java 2D (AffineTransform.hashCode() inconsistent 
with equals(Object) when some coefficients mix positive and negative zeros). 
However I'm not yet registered on the Java2D mailing list. Should I register on 
the mailing list of each group for which I may propose a patch?

     Regards,

         Martin