Release v0.2.0

• classes.new_instance method can take an options list now as well
• added classes.get_enum method to return the instance of a Java enum item
• added classes.new_instance method to create new instance of Java class
• added typeconv.jstring_list_to_string_list method to convert a java.util.List containing strings into a Python list
• added typeconv.jdouble_to_float method to convert a java.lang.Double to a Python float
• in module typeconv renamed methods: string_array_to_list to jstring_array_to_list, string_list_to_array to string_list_to_jarray, double_matrix_to_ndarray to jdouble_matrix_to_ndarray, enumeration_to_list to jenumeration_to_list, double_to_float to float_to_jfloat
• added weka.timeseries module that wraps the timeseriesForecasting Weka package