Added files for tasks:
11_dictionary
12_rpn_calculator
13_xml_document
14_array_extensions
15_in_words
08_temperature_object: All runs except bonus test.
08_temperature_object: Added two Temperature subclasses - Celsius, Fahrenheit
11_dictionary: Added class and methods for the initial work.
Completed the first test.
11_dictionary: Added two Method and complete task.