initial commit

Stgn.java - main library
Stgnc.java - provides command line interface
StgnGUI.java - provides simple GUI interface
Test.java - test routines
Util.java - a few simple wrappers for Array and File manipulations
BitArrayInputStream.java - wrapper for bit manipulations
BitArrayOutputStream.java - wrapper for bit manipulations

run.bat - sample of how to run console application
test_jar.bat - sample of how to run test application

build.xml - ant build file

container.png - sample image file
secret.jpg - sample image file