Update/cleanup Makefiles (#265)

- add new target "make mfkey" to build mfkey32 and mfkey64
- include above when "make all"
- fix Qt detection for Kali Linux
- create and use dependency files when building client
- create client/lualibs/usb_cmd.lua from include/usb_cmd.h when building client
- add Windows *.exe files with "make tarbin"
- For the time being don't include Makefile.common in Makefile and client/Makefile
- set com3 as default flashing port for Windows (including mingw)
- remove static targets snooper and cli. Remove their sources as well.

client/usb_cmd_h2lua.awk

@@ -0,0 +1,15 @@
+BEGIN {
+	print "--[["
+	print "These are Proxmark command definitions."
+	print "This file is automatically generated from usb_cmd.h - DON'T EDIT MANUALLY."
+	print "--]]"
+	print "local __commands = {"
+}
+
+#$1 ~ /#define/ && $2 ~ /^CMD_([[:alnum:]_])+/ { print $2, "=", $3, "," }
+$1 ~ /#define/ && $2 ~ /^CMD_[A-Za-z0-9_]+/ { sub(/\r/, ""); print $2, "=", $3 "," }
+
+END {
+	print "}"
+	print "return __commands"
+}