Partial revert of 9f1108e52e4787610a488868d774992e1ca28979.

This change should not be necessary.
Merge pull request #164 from bantu/master

Partial revert of 9f1108e52e4787610a488868d774992e1ca28979.
RSA: putty keys weren't being formatted correctly
Merge branch 'master' of https://github.com/phpseclib/phpseclib
Update SSH2.php

Use of undefined property: "$this->bitmask".

In context, it seems that it should reference the "bitmap" property.
Merge pull request #167 from phonzie/patch-2

SSH2.php: Use of undefined property: "$this->bitmask"
SFTP_Stream: Fixed typo in _parse_path

typo: isset($this->contenxt)
should be $this->context
Merge pull request #168 from phonzie/patch-3

SFTP_Stream: Fixed typo in _parse_path

* phonzie/patch-3:
  SFTP_Stream: Fixed typo in _parse_path
Initing eof to false

The call _stream_eof() must return a boolean, not null.
Returning null makes PHP believe that the method wasn't implemented.

Fixes #170
Making Net_SFTP::chdir capable of handling the empty string.

Fixing a ugly notice when using the empty string as parameter for chdir:
  Notice: Uninitialized string offset: -1 in Net/SFTP.php line 617
Making Net_SFTP::chdir capable of handling the empty string.

Updated patch after hint from bantu.
Merge pull request #172 from PVince81/sftp-stream-feof-fix

Initing eof to false
SFTP/Stream: log when constructor is called
Merge pull request #173 from h4cc/patch-1

Making Net_SFTP::chdir capable of handling the empty string.
SFTP: don't do $dir[-1] check if $dir === ''
SFTP: Removed dead code

variable: $initialize = true, ironically - is initialized but never used.
Feel free to deny if this is reserved for future implementation(s).
Merge pull request #176 from phonzie/patch-4

SFTP: Removed dead code

* phonzie/patch-4:
  SFTP: Removed dead code
SSH2: Continue Subsystem Implementation.

Removed unused piece of code @2352.
Added $this->_get_interactive_channel() to reset(). Unless we don't want to close the subsystem channel?? Leaving that decision up to you.
Merge pull request #178 from phonzie/patch-5

SSH2: Continue Subsystem Implementation.
Removed vim comments

Reformated files