ability to filter for usb scales

[tresf]

Placeholder for the ability to filter out all scale hardware matches. e.g. https://github.com/qzind/sift#usb-scales

Some sample data from a client:

knownScales: [
        { "name": "Mettler Toledo PS60", vendorId: "0eb8", productId: "f000", readSize:8 },
        { "name": "Fairbanks SCB-R9000", vendorId: "0b67", productId: "555e", readSize:6, endPoint:"81" },
        { "name": "Stamps.com Model 510 5LB Scale", vendorId: "1446", productId: "6a73", readSize:8 },
        { "name": "Dymo Endicia 75LB Scale", vendorId: "1446", productId: "6a78", readSize:8 }
    ],

[tresf]

Some more samples from a client:

Name	Vendor Name	Product Name	Vendor Code	Product Code
Stamps.com Stainless Steel 5 lb. Digital Scale	Stamps.com	Stainless Steel 5 lb. Digital Scale	0x2474	0x0550
Stamps.com Stainless Steel 35 lb. Digital Scale	Stamps.com	Stainless Steel 35 lb. Digital Scale	0x2474	0x3550
Stamps.com Stainless Steel 70 lb. Digital Scale	Stamps.com	Stainless Steel 70 lb. Digital Scale	0x2474	0x7050
Stamps.com Model 510 5LB USB Scale	Stamps.com	510	0x1446	0x6a73
Stamps.com Model 2510 25LB USB Scale	Stamps.com	2510	0x1446	0x6a75
Stamps.com Model 2510-1 25LB USB Scale	Stamps.com	2510-1	0x1446	0x6a76
M10 10 lb Digital Postal Scale	Dymo	M10	0x0922	0x8003
M25 25 lb Digital Postal Scale	Dymo	M25 0x0922	0x8004
S250 250 lb Portable Digital Shipping Scale		Dymo	S250	0x0922
Fairbanks Scales SCB-R9000	Fairbanks	SCB-R9000	0x0b67	0x555e
PS60 Scale	Mettler Toledo	PS60	0x0eb8	0xf000
Anonymous 10 lb USB Postal Scale	Anonymous	Anonymous	0x6096	0x0158
Anonymous Scale	Anonymous	Anonymous	0x046d	0xc52f
Anonymous Scale	Anonymous	Anonymous	0x046d	0xc52b
Anonymous Scale	Anonymous	Anonymous	0x0bda	0x0152
Anonymous Scale	Anonymous	Anonymous	0x192f	0x0416
Anonymous Scale	Anonymous	Anonymous	0x03f0	0x134a
MXX xx lb Scale	Dymo	MXX	0x0922	0x8007
M25-US 25 lb Digital Postal Scale	Dymo	M25-US	0x0922	0x8009
Mettler Toldeo BC60 Scale	Mettler Toledo	BC60	0x0eb8	0xf000
Pitney Bowes 397-B	Pitney Bowes	397-B	0x046d	0xc338