Fix clipping when any vertice lie on clipping window

[kaustubh135]

When you give input for vertice which lies on clipping windows the complete diagram is clipped. To fix this I have editedleftClip, righrClip, topClip and bottomClip by adding a >= or <= at required position. For example try using this inputs,
xmin=100, ymin=100
xmax=300, ymax=300
points= {{200,200},{400,400},{250,300}}

I also changed name of new array to nw as new was causing problem while running in codeblock