1. ignore .project file.
2. change jdom dependence from b9 to 1.0 version.
3. because GAE not support visit sun.net.www.protocol.http package, so
change HttpURLConnection from sun.net.www.protocol.http to java.net.
4. because GAE not support visit HttpURLConnection.setFollowRedirects,
so remove it instead of just set instance redirect follow.