Pysmbc

* Context.set_credentials_with_fallback()
* Context.getxattr, Context.setxattr
* smbc.XATTR, smbc.XATTR_ACL, smbc.XATTR_ACL_SID, smbc.XATTR_ALL,
smbc.XATTR_ALL_SID, smbc.XATTR_FLAG_CREATE, smbc.XATTR_FLAG_REPLACE,
smbc.XATTR_GROUP, smbc.XATTR_GROUP_SID, smbc.XATTR_OWNER,
smbc.XATTR_OWNER_SID, smbc.XATTR_REVISION

* Context.optionUseKerberos
* Context.optionFallbackAfterKerberos

* read/iternext now use Bytes type

* smbc.NoSpaceError
* Now compiles against Python 3

* iteration file read
* rewrite tests for python nose
* fixed stat portability issue
* smbc.NoEntryError
* smbc.ExistsError
* smbc.NotEmptyError
* smbc.TimedOutError
* File.seek() and File.lseek()

* Context.chmod()
* Context.rename()
* Context.unlink()
* Context.creat()