Closes #35: WindowHandler - Property vscrollable - Getter/Setter - Availability of vertical scrollbar
[+] Own Testsuite to perform basic testing (to be able to do some tests at the beginning)
Closes #36: WindowHandler - Property hscrollable - Getter/Setter - Availability of horizontal scrollbar
Merge branch 'feature/#36_hscrollable' into develop
Closes #38: WindowHandler - Property sizebox - Getter/Setter - Ability to resize window (moved from property resizeable)
Closes #39: WindowHandler - Property maximizebox - Getter/Setter - Availability of maximizebox
Closes #40: WindowHandler - Property minimizebox - Getter/Setter - Availability of minimizebox
Merge branch 'feature/#39_maximizebox' into develop
Closes #42: WindowHandler - Property owner - Getter/Setter - Get/set Owner of window
[RC] EDE 0.9.4

#35: WindowHandler - Property vscrollable - Getter/Setter - Availability of vertical scrollbar (INTERN)
#36: WindowHandler - Property hscrollable - Getter/Setter - Availability of horizontal scrollbar (INTERN)
#38: WindowHandler - Property sizebox - Getter/Setter - Ability to resize window (moved from property resizeable) /INTERN)
#39: WindowHandler - Property maximizebox - Getter/Setter - Availability of maximizebox (INTERN)
#40: WindowHandler - Property minimizebox - Getter/Setter - Availability of minimizebox (INTERN)
#42: WindowHandler - Property owner - Getter/Setter - Get/set Owner of window (INTERN)
[V] EDE 0.9.4

#35: WindowHandler - Property vscrollable - Getter/Setter - Availability of vertical scrollbar (INTERN)
#36: WindowHandler - Property hscrollable - Getter/Setter - Availability of horizontal scrollbar (INTERN)
#38: WindowHandler - Property sizebox - Getter/Setter - Ability to resize window (moved from property resizeable) /INTERN)
#39: WindowHandler - Property maximizebox - Getter/Setter - Availability of maximizebox (INTERN)
#40: WindowHandler - Property minimizebox - Getter/Setter - Availability of minimizebox (INTERN)
#42: WindowHandler - Property owner - Getter/Setter - Get/set Owner of window (INTERN)