Implementing coin algorithms

src/cutecoin/gui/mainWindow.py

src/cutecoin/gui/processConfigureCommunity.py

src/cutecoin/models/account/__init__.py

src/cutecoin/models/coin/__init__.py

src/cutecoin/models/coin/algorithms.py

src/cutecoin/models/wallet/__init__.py

src/cutecoin/tools/exceptions.py