Added ability to select Wire bus in begin function

[mjs513]

Added ability to select wire bus in setup.

1. mySensor.begin() defaults to Wire
2. mySensor.begin(&Wire1) sets I2C to use Wire1
3. mySensor.begin(&Wire2) sets I2C to use Wire2

Also incorporated Pull Request 8.

Hope this helps someone.
Mike

[nseidle]

I like this feature a lot. I think all libraries should have the Wire stream passed to it as an option. However, your PR seems to include a lot of other small changes that have me worried. Why did you change this line (variable declare of dig_H6)?

[nseidle]

I see why you changed H6 - explained in a previous PR. There's still a lot of changes that are not Wire stream related in your PR. Can you either submit a new one or help me understand your other changes?

[mjs513]

Hi Nathan
Sorry for the delay in responding - had to go look at what I changed, its been awhile since I looked at it :). Anyway in going back over the changes anything not stream related came from the PR#8. Just had to do a sanity check before I responded. There should be no other changes.

The line you referenced comes directly from PR#8 which I see you merged already.

Mike

[nseidle]

Hi Mike - Thanks for this PR. I have implemented the core of your idea but rolled it into a larger overhaul of the library. We should have a v2.0 of the lib available soon with examples showing how to use other Wire ports.