Update ApiV4.cs

[Elijan9]

Remove "include[]" parameter from call to "parts/match", this is likely only supported for pro customers. Fixes octopart#4

[robproject]

Thank you so much for this. How did you determine this was the issue? I'm very interested.

[Elijan9]

I debugged the issue in Visual studio, and when I found the request that was causing an error I reproduced the request that was failing and compared it to one I made myself and which was working. Knowing data sheets are only supported in the pro version, this was my first suspect. As I suspected, after removing "include[]" my reproduced request was no longer failing, so I removed it from the addin and everything we needed started working.

(BTW while the API is working we're still seeing some issues in the data content supplied by manufacturers, e.g. most only offer USD prices, one only has GBP and there's only one that actually has EUR prices, so we have to convert everything else from USD/GBP to EUR ourselves now. And we have set our country and currency in our preference.)