Add description for min_n_samples parameter
Move estimator_, n_trials_, inlier_mask_ initialization to fit method and use
LinearRegression and Perceptron as default base estimators.
Add extra line between doc string sections
Add support for absolute and relative min_n_samples
Add default values for min_n_samples, residual_threshold
Include random_state utility
Use random_state in test cases
Explain behavior when no base estimator is specified
Fix test case function name
Add specific test case for score method
Add specific test for predict method
Mark all parameters as optional