Support for encryption of Unicode characters

Current Situation

• Users report that a % character encrypted to a value of a Job Resource variable is not properly decrypted.
• Users have to double the "%" otherwise the character is not present anymore when I decrypt the password with js7-decrypt.cmd.
• The issue occurs for Windows when using the js7-encrypt.cmd script. The % characeter has a special meaning in Windows and is substituted before encryption can occuur.

Desired Behavior

• Encryption/Decryption should support any Unicode characters.

Maintainer Notes

• The issue is dismissed as it is a limitation of the Windows Shell. JS7 classes for encryption/decryption process any Unicode characters, including %. 
• Users of a Windows Platform find a PowerShell cmdlet that is not affected by Windows Shell limitations. Recommendations and examples are available from the JS7 - How to encrypt and decrypt using PowerShell article.