V3.0b

Update v3.0b

• Added support for MacOS.
• No need to be in the same directory with the executable.
• When clicking on executable file, a pop-up will be shown to select the folder.
• You can also drag and drop like it used to be.

pkg-merge

• Added support for MacOS.
• Fixed [warn] assumed root PKG file '' doesn't match PKG magic. This was due to filesystem::directory_iterator class. It does not read files in alphabetical order. See Does boost directory_iterator visit files and folders in alphabetical order on Windows