[issue/39] Abstract test case for Crypt_AES.
[issue/39] Test case for Github ContinuousBuffer issue 39.
[issue/39] Extend tests to cover other modes. Also IVs, keys, etc.
Merge pull request #40 from bantu/issue/39

[issue/39] Test case for Github ContinuousBuffer issue 39
Merge branch 'master' of https://github.com/phpseclib/phpseclib
SSH2: Make $stop be after all network activity