Update README.md
Merge branch 'master' of https://github.com/gilfether/phpcrypt.git
Added the changes for version 0.3.1
Commented out reference to 3Way cipher for the version 0.3.1 updat since
3Way is still under development
Added the setIV() function to replace passing the function into
phpCrypt::Encrypt() and phpCrypt::Decrypt() functions
Updated to reflect the changes in how the IV is used and is no longer
passed into phpCrypt's Encrypt() and Decrypt() functions