Eclipse + Pydev问题 ： pydev unresolved import

http://blog.csdn.net/qq_22765745/article/details/71054030
http://blog.csdn.net/amghost/article/details/20069005
http://blog.csdn.net/chris_111x/article/details/52312523
https://stackoverflow.com/questions/4631377/unresolved-import-issues-with-pydev-and-eclipse
http://heipark.iteye.com/blog/1737905
http://www.kaij.org/blog/?p=28
http://www.codeweblog.com/%E8%A7%A3%E5%86%B3eclipse-pydev%E4%B8%ADimport%E6%97%B6%E6%8A%A5%E9%94%99-unresolved-import/
https://stackoverflow.com/questions/23237692/pydev-unresolved-import
https://stackoverflow.com/questions/5394887/unresolved-import-in-pydev
http://blog.csdn.net/w346850397/article/details/41440831

http://www.pydev.org/manual_101_interpreter.html
http://www.pydev.org/manual.html
http://www.pydev.org/history_pydev.html