candidate node finder
change first split finder and max density finder
temp add jni
jni test
missing libwrapper
change dump function, set default screen width to 1200
change max_width threshold to 75%
add jniparser
missing log4cxx initialization
log4cxx initialization before MapDriver
redundant comma of avro schema
add comments for driver.h
change content node pick

first split and density pick use default screen 1024x640
move cleanup extern css after setCSS
if node is not element node libcss crash
change density pick, text/link ratio statistics

density increase to 0.6f
Merge branch 'test'