Reorganization as a Maven project with several sub-modules projects.
Corrections to enable the build with Maven:
1) Added a system property "create-jar" to not create a JAR for the generated classes so they can be handled by the Maven build.
2) Made so that the Java version for source and target is the same.
Merge branch 'wsc23' into maven

Conflicts:
	dist/build.xml
	sfdc-wsc-tools/src/main/java/com/sforce/ws/tools/wsdlc.java