Implement get_ methods for PreferredBackBufferWidth and PreferredBackBufferHeight (issue #259)
Implement get_ methods for PreferredBackBufferWidth and PreferredBackBufferHeight (issue #259)

iskiselev/JSIL,Trattpingvin/JSIL,volkd/JSIL,TukekeSoft/JSIL,sander-git/JSIL,volkd/JSIL,hach-que/JSIL,FUSEEProjectTeam/JSIL,Trattpingvin/JSIL,iskiselev/JSIL,mispy/JSIL,Trattpingvin/JSIL,sq/JSIL,volkd/JSIL,x335/JSIL,iskiselev/JSIL,Trattpingvin/JSIL,hach-que/JSIL,iskiselev/JSIL,sq/JSIL,sander-git/JSIL,TukekeSoft/JSIL,acourtney2015/JSIL,dmirmilshteyn/JSIL,x335/JSIL,hach-que/JSIL,mispy/JSIL,FUSEEProjectTeam/JSIL,sq/JSIL,dmirmilshteyn/JSIL,volkd/JSIL,dmirmilshteyn/JSIL,acourtney2015/JSIL,antiufo/JSIL,volkd/JSIL,acourtney2015/JSIL,FUSEEProjectTeam/JSIL,mispy/JSIL,antiufo/JSIL,antiufo/JSIL,mispy/JSIL,iskiselev/JSIL,dmirmilshteyn/JSIL,sander-git/JSIL,x335/JSIL,FUSEEProjectTeam/JSIL,hach-que/JSIL,sander-git/JSIL,sander-git/JSIL,x335/JSIL,sq/JSIL,sq/JSIL,hach-que/JSIL,TukekeSoft/JSIL,FUSEEProjectTeam/JSIL,antiufo/JSIL,acourtney2015/JSIL,TukekeSoft/JSIL,acourtney2015/JSIL