comment out unused import lines
comment out unused code
update .classpath by/for eclipse/adt
capable ant build by:

/opt/android-sdk/tools/android update project -p . -n RajawaliExamples
sign apk with mhdroidkey for mhfan only

    keytool -genkey -keystore ~/.android/mhdroid.keystore \
	-sigalg MD5withRSA -keyalg RSA -keysize 2048 \
	-alias mhdroidkey -dname \
	    "CN=Android Application,C=CN,ST=AnHui,L=HeFei" \
	-keypass mhdroid -storepass mhdroid -validity 36500 -v