Merge pull request #12 from Jinjiang/master

modified "change" option to get changed json data
Merge pull request #13 from Jinjiang/master

"Add New Value" button
make appender button smaller + add cursor: pointer on it
minify using google closure compiler
add propertyclick callback with a path to the clicked property as the only argument
delete one of the redundant README files
add installation instructions to README
Fixes #14: use .on() instead of .live() jQuery method; .live() is depricated