Add README.md

Author: TechnicallyCoded

README.md

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+# Simple Java Unzipper
+
+## Build
+`gradlew build`
+
+## Run
+`java -jar SimpleUnzipper-<version>.jar [zip-file-name] [destination-folder] [verbose]`
+
+ - zip-file-name (optional): Specify a file name to be used as the source zip folder. By defaul, if no file is specified, the program will find the first ".zip" in the current working directory.
+ - destination-folder (optional): Specify a folder to place all the files into. By default, the program will use the current working directory.
+ - verbose (optional): Valid options are "true" or "false". Verbose printing is enabled by default.