DES: Fixed CFB/OFB and continuousBuffer

FIXED: multiple calls to enable/disableCMode() will work now
FIXED: CFB/OFB modes
FIXED: "Illegal string offset" and strlen(array()) Warning/Notice
SSH1,SSH2: strpos expects string - not array
Merge remote-tracking branch 'upstream/master'
SSH2: $this->channel_buffers is an array - not a string
[constant-trickery] Better name for constant redefine method.
[constant-trickery] Also test without OpenSSL.
Merge pull request #50 from bantu/constant-trickery

Also test Math_BigInteger without OpenSSL.
Merge branch 'petrich'
Merge remote-tracking branch 'upstream/master'
3DES: Fixed ContinuousBuffer() in CTR/CFB/OFB

FIXED: multiple calls to enable/enableContinuousBuffer() work's now in CTR/CFB/OFB
FIXED: "Illegal string offset" and strlen(array()) Warning/Notice
Performance improvement in CFB Mode with enableContinuousBuffer() using MODE_MCRYPT
[travis/php-5.3.3] Build on PHP 5.3.3 in addition to the latest 5.3 version.
Merge pull request #54 from bantu/travis/php-5.3.3

[travis/php-5.3.3] Also build on PHP 5.3.3 in addition to the latest 5.3...
[travis/php-5.5] Also build on PHP 5.5 environment.
Merge pull request #55 from bantu/travis/php-5.5

[travis/php-5.5] Also build on PHP 5.5 environment.
[coverage-html] Generate HTML code coverage report and rsync it out of travis.
[coverage-html] Use PHP version number in folder name.
[coverage-html] Add latest symlink.
[coverage-html] Add code coverage report link to readme.
[coverage-html] Put fingerprint of RSA host key into variable.
[coverage-html] Add comment to expect installation.