files moved into maven project structure
added a pngnow.png image and changed RtfTest.java so it actually looks
in the right place for the file.
Update the README with comments of the changes
to make the tests work cleanly under maven
update pom.xml with URLs and some comments
This is a working build that makes all of the necessary parts to deploy
to the Maven Repository Central

I still have this setup so we have to manually sign all of the jar
files in the target directory via gpg to make the ascii armor signature
files  *.asc

Also, we have to manually copy the pom.xml into the target directory as
itext-4.2.0.pm 

and then run

$ gpg -ab itext-4.2.0.pom 

to create the itext-4.2.0.asc file 

I have to get the maven-gpg-plugin to work properly.

after signing manually, we can run mvn repository:bundle-create
to wrap up all of the bundle which can be uploaded to sonatype.
I want to also work on making the release process work.
Merge changes from weiyeh
Changing the project to use a maven structure.

Conflicts:
	.gitignore
	README.rst