Country code as an argument in "openalpr.Start()"

[the-darc]

I intend to use this library to indentify plates outside US. I saw that you are passing always the same country ID in node_openalpr.cc#L36.

I belive that it could be received in the openalpr.Start() method.

[sneko]

@the-darc

Some forks have implemented this feature. I started from one of them and fixed some issues due to new version of OpenALPR 2.3.0 :
https://github.com/Sneko/node-openalpr

#22