AES: Fix broken CFB and disableContinuousBuffer()
AES: Fix broken CFB and disableContinuousBuffer()

Quoting from petrich's pull request (from which this commit was inspired):

Fixed: Broken CFB in continuous mode when using CRYPT_AES_MODE_MCRYPT (related to: #39 )
Fixed: Multiple calls to enable/disableContinuousBuffer()
Fixed: Some PHP Notice/Warnings about strlen(array())

ericariyanto/phpseclib,phpseclib/phpseclib,metaclassing/phpseclib,creatuity/phpseclib,danog/phpseclib,danog/phpseclib,kenichiii/phpseclib,phpseclib/phpseclib-php5,splitice/phpseclib,thaigialai1987/phpseclib,paragonie-scott/phpseclib,kenichiii/phpseclib,splitice/phpseclib,phpseclib/phpseclib-php5,paragonie-scott/phpseclib,thaigialai1987/phpseclib,creatuity/phpseclib,terrafrost/phpseclib,metaclassing/phpseclib,melya/phpseclib,ericariyanto/phpseclib,melya/phpseclib