SshScpFile.lastModified support

[dkcm]

SshScpFile does not parse the date and timestamp output of "ls -ld", stopping at file size.

$ ls -ld *.log
-rw-r--r-- 1 kuand2 Administrators 5766 Apr 2 2015 fxc.log
-rw-r--r-- 1 kuand2 Administrators 26841736 Sep 8 19:31 iota.log

using v4.3.2