Improve error handling so the init() method will return true or false

[wmarkow]

It would be good if init() method will return false when there are some hardware issues with I2C communication to PT2314. Currently the init() method returns always 1 (which I think is meant to be success). I was thinking that it could return the error code from the Wire library:

• 0 success
• 2 error: address send, nack received
• 3 error: data send, nack received
• 4 other twi error but it will break the current API of init() method (which returns 1 as a success).

I propose at the beginning to return true or false from the init() method. This solution helped me a lot when investigation #3.

[wmarkow]

I see that pull request #5 has been merged. I'm closing this issue.