Click the blue arrow to trigger a file picker

On top of drag'n dropping files, it's no possible to choose them through a file picker.

Handle grayscale .png properly

Change the way input files or opened to handle grayscale images properly (fixes #22)

JPG support

9-Patch Resizer will now be able to resize JPG as well, hopefully. The output will be saved with a 90% quality settings. Don't hesitate to provide feedback, or criticize.

Build system re-written to use maven. Bye bye ant.

Command line support

You can now use 9 Patch Resizer from command line (thanks to jeanbaptistelab - https://github.com/jeanbaptistelab)
From the terminal:

• $ java -jar Resizer.jar file1 file2
• $ Resizer.exe file1 file2

Save your settings

• You can now make your settings permanent easily
• A few bug fixes

Choose densities

It's now possible to change the input and output densities, or create your own (it's a bit complicated at the moment : you need to copy the densities.json from Resizer directory, but can then tweak it as needed)

Add support for red borders

Add support for red borders (I believe they are used for margins, but I'm not so sure...)