Incorrect Canon model names in CanonModelID

[dmitrys]

0x3340000: PowerShot SX50 -> PowerShot SX50 HS
0x2820000: PowerShot A3100 IS / A3150 IS -> PowerShot A3100/A3150 IS

I'm using the metadata to generate an ID -> names mapping, and the latter results in

["PowerShot A3100 IS", "A3150 IS"]

[Phil Harvey]

I'll fix the SX50 IS name, thanks.

I wouldn't call ExifTool's ID for the A3100 IS / A3150 IS incorrect, but I can see your point about parsing, so I will change this too.

- Phil

[dmitrys]

Thank you very much.

Please note that it's SX50 HS.

[Phil Harvey]

Thanks.   I did get it right in the code.

- Phil