Changes for version 2.02
- Initialized $x and $y to make the code warnings-compliant.
 - Converted globals to instance variables so that the OO interface can work correctly; added tests to ensure that.
 - Eliminated modification of return value from unpack.
 - Increased efficiency on long messages.
 - Fixed buggy tests.
 - Added some documentation and tests.
 
Modules
Perl implementation of the RC4 encryption algorithm