SinglePageChatTest refactoring
Move the wiring of event listeners to page elements in SinglePageChat constructor.
Tests now need to instantiate dependencies (buttons, fields, etc.)
Issue-Id: #8
SinglePageChat: new unit test "sendMessageFromField() should clear message field's value"
Issue-Id: #8
SinglePageChatTest: rename spy variables
SinglePageChat: new unit test "sendMessageFromField() should append message to log"
Issue-Id: #8