Add ability to configure a default path of sources/javadocs

[GoogleCodeExporter]

What steps will reproduce the problem?
1. After resolving Idea doesn't resolve sources/javadocs, since roots of 
packages are src/main/java, src/test/java etc

What is the expected output? What do you see instead?
1. In the pluggin setting is preferable to see a setting to configure a set of 
package root paths, e.g. [src/main/java, src/test/java] etc.
2. In the Idea module path to sources will be as following:
        <CLASSES>
          <root url="jar://D:/opt/.ivy2/cache/org.mockito/mockito-all/1.8.5/jars/mockito-all-1.8.5.jar!/" />
        </CLASSES>
        <SOURCES>
          <root url="jar://D:/opt/.ivy2/cache/g.mockito/mockito-all/1.8.5/jars/mockito-all-sources-1.8.5.jar!/src/main/java" />
          <root url="jar://D:/opt/.ivy2/cache/g.mockito/mockito-all/1.8.5/jars/mockito-all-sources-1.8.5.jar!/src/main/resources" />
          <root url="jar://D:/opt/.ivy2/cache/g.mockito/mockito-all/1.8.5/jars/mockito-all-sources-1.8.5.jar!/src/test/java" />
          <root url="jar://D:/opt/.ivy2/cache/g.mockito/mockito-all/1.8.5/jars/mockito-all-sources-1.8.5.jar!/src/test/resources" />
        </SOURCES>

What version of the product are you using? On what operating system?
1.0.6,Windows,Linux

Please provide any additional information below.

Original issue reported on code.google.com by vds...@gmail.com on 26 Nov 2013 at 2:16