Added README.md file
Added lab1 files
Added project into settings.gradle
Fixed some style issues
Removed unused imports from tests
Useless parentheses removed, sorting class refactored
deque: initial commit for lab1
deque: add addFirst() method
deque: add addLast() method

To verify that deque is not empty after addFirst or addLast execution,
unit tests are implemented.
deque: add getFirst() and getLast()
deque: initialize both first and last in add methods
deque: throw NoSuchElement exception from get methods if deque is empty
deque: add remove methods

Verify that remove methods return NoSuchElement exception if deque is empty.
Verify that remove methods elements recently added.
deque: decrement size if item is removed
Added Currency class and basic test suite
deque: verify that it is possible to add and remove arrays of items
deque: add clear method

Remove private size variable as not used.
Added Money class and basic test suite
Added comparing methods for Currency
Added convert methods to Money class