v1.0.0

What's changed

• Refactor all API to opencv-python styles
• Better Exceptions, #13
• fix #19
• Refactor T Mat.at<T>(int row, int col, [int i2]) and Mat.set<T>(int row, int col, T val), now T can be int, double and CvVec(wrapper of cv::Vec, e.g., Vec3b)
• Convert to native wrappers fast by adding suffix to variable like GetX's .obs, find and explore more in the documentations from pub.dev and tests, example:

final a = <int>[1, 2, 3];
cv.VecUChar vec = a.u8;
cv.VecInt vec1 = a.i32;
final a = <cv.Point>[cv.Point(0, 0), cv.Point(1, 1)];
VecPoint vec = a.cvd;  // here cvd means 'cv dart'

• Find more usage in https://pub.dev/documentation/opencv_dart/1.0.0/

Full Changelog: v0.6.7...v1.0.0