Add 'no quotes' option for CmdStagerPrintf

Exploit developers can use the ':noquotes => true' option to avoid
single quotes surrounding the octal escapes argument.
Updated sniffer binaries

These updated binaries include a packet-sniffer fix which results in
sniffing working on x86 builds of Windows 8 and Windows 8.1.
Land #2490, new sniffer extenstion binaries
Land #2489, @mwulftange :noquotes option for CmdStagerPrintf
Correct the name of "DynDNS" (not Dyn-DNS)
Land #2492, s/Dyn-DNS/DynDNS/
Merge branch 'master' into http-proxy