Add referenced Library to graph model

[GoogleCodeExporter]

The libraries dependencies are described within .classpath file. See the 
<classpathentry 
kind="lib" ... />


.classpath file sample: 

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" path="src"/>
    <classpathentry kind="src" path="test"/>
    <classpathentry exported="true" kind="lib" path="libs/collections-generic-4.01.jar"/>
    <classpathentry exported="true" kind="lib" 
path="libs/org.eclipse.zest.layouts_0.7.0.MJ.jar"/>
    <classpathentry kind="con" 
path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.
launcher.Stand
ardVMType/J2SE-1.5"/>
    <classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
    <classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/3"/>
    <classpathentry kind="output" path="bin"/>
</classpath>

Original issue reported on code.google.com by mounir.j...@gmail.com on 21 May 2008 at 8:26