Layout and colour scheme

Changed layout of application; added a general colour scheme.
Merge remote-tracking branch 'origin/test' into Dico

Conflicts:
	IntelliGraph/mainwindow.ui
Styling one popup

One popup styled like the rest of the application
Colour scheme popupedge; rework popupedge

Reworked popupedge completely to account for Jelle's changes to the Edge
class. Added colour scheme to the popup.
Merge branch 'test' of https://github.com/SEGroup10/IntelliGraph into test

Conflicts:
	IntelliGraph/popup.cpp
	IntelliGraph/popup.h
	IntelliGraph/popup.ui
	IntelliGraph/popupedge.cpp
	IntelliGraph/popupedge.h
	IntelliGraph/popupedge.ui
	IntelliGraph/workspace.cpp