Moved password frame to separate class

PasswordFrame class now exists to hold the password line edit and to
handle queries for the current password.
Moved header frame to new class

Moved header frame to a new class for better encapsulation.
Moved file list to new class

Moved file list model and view to a container frame to improve
encapsulation.
Moved message text edit to new class

Moved message text edit to a new class for better encapsulation.
Moved control buttons to new class

Moved control buttons to a new class for better encapsulation.
Updated Delegate class

Added C++11 features to Delegate and improved clarity with minor edits.
Added new classes to MainWindow

Added new classes to MainWindow, removed previous code.
Make_unique in Kryvos class

Added make_unique to create a unique pointed member in Kryvos.cpp.
Replaced a bool with auto.
Managing type more closely in Crypto class

Now using casts with auto statements for readibility. Also, improved the
comparison conditions on the progress calculation. Other edits to
improve readability.
Updated project file with new classes

Project file now references new classes.
Improved main.cpp readability

Improved readability in main.cpp.
Added include guard to make_unique.h

Added a header guard to make_unique.h to protect against multiple
inclusion.