[task/travis-skipped-tests] List skipped tests on travis.

Turn on PHPUnit's verbose mode so we get detailed information about skipped
tests on travis (when there are any).
[task/fix-test-autoloader] Fix autoloader to support failing/erroring tests.

Before showing error output PHPUnit 3.7.x calls class_exists() on some PHPUnit
Extension class names that may not exist. Calling class_exists() already
triggers the autoload function in which require() then obviously fails.

We now check whether a file is includable by simply looping over all possible
include directories.
fixed corrupted decrypt() in CTR mode

$buffer['encrypted'] (which is always empty) should be $buffer['ciphertext'] or buffered stream will get corrupt...

Example:
define('CRYPT_AES_MODE',CRYPT_AES_MODE_INTERNAL);//in MODE_MCRYPT all is fine
$aes = new Crypt_AES(CRYPT_AES_MODE_CTR);
$aes->setKey(':-8');
$aes->enableContinuousBuffer();
$plaintext = ':-):-):-):-):-):-)';
for($i=0; $i<strlen($plaintext); $i++) {
 echo $aes->Decrypt($aes->Encrypt($plaintext[$i]));
}

Output:
:-):-):-):-):-):-(

Expected:
:-):-):-):-):-):-)


After Bugfix, output is:
:-):-):-):-):-):-)
Merge remote-tracking branch 'bantu/task/travis-skipped-tests'

* bantu/task/travis-skipped-tests:
  [task/travis-skipped-tests] List skipped tests on travis.
Merge remote-tracking branch 'bantu/task/fix-test-autoloader'

* bantu/task/fix-test-autoloader:
  [task/fix-test-autoloader] Fix autoloader to support failing/erroring tests.
Merge pull request #43 from petrich/patch-1

fixed corrupted decrypt() in CTR mode
Fixed CFB Decrypt(). Fixed OFB warnings

Fixed/rewritten: Decrypt() in CFB mode to work clean with enableContinuousBuffer()

Fixed: PHP's strlen(array()) warning in OFB mode,

Fixed: disableContinuousBuffer() clear's now also the $enbuffer/$debuffer arrays so that multiple calls to enable/disableContinuousBuffer() will work without old buffers
Merge remote-tracking branch 'petrich/patch-2' into petrich

Conflicts:
	phpseclib/Crypt/Rijndael.php
CS adjustments to petrich's code and optimizations
AES.php in mcrypt mode always treated CFB as though it was a continuous cipher
Merge remote-tracking branch 'origin/petrich'