Initial empty JUnit commit.

Added the JUnit package to Eclipse and the classpath; created an empty
unit test class.

Todo: Find out how to integrate console input and output into unit
tests. Otherwise, no meaningful unit test for the encryption program can
be provided.

Idea: Move ALL main coding into another class that returns the string
based upon input, and have a "slim" main method. Then, run the unit
tests against the other class.
Preparation for unit tests.

Changed the way the output is created, so that it can be consumed from
test classes.
Initial version of the unit test, fetching console output. Not working.

Initial stuff fetched from the internet and adapted. So far, it only
checks for the last line of the output string; however, we need to check
for the whole string. Will need to check how to describe multi-line
strings in Java.
Merge branch 'InitialUnitTest_TestInEclipse' into develop

Intermediate merge of the unit tests into develop.

Okay, they don't run yet, but the methods are in place, and there are no
errors or warnings, so I check this one to develop. (Also, I want to see
how this looks like in gitg).
Typo in test class corrected.

The @Test annotation was accidentially moved to a comment, rendering the
second test method useless for JUnit.
First 2 unit tests are now working.

The first tests work. I did this by redirecting the console output and
analyzing it for the encrypted / decrypted strings. This avoids having
to check the fixed input and output lines that do not need testing.
Merge branch 'InitialUnitTest_TestInEclipse' into develop

Merge the first unit tests into development.

The first two unit tests now work as expected and are merged back into
develop branch.