Update workshop notes. Mostly OOP related entries added.

Course Notes/piles.csv

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+Pile_type,Profile
+P01,HE200A
+P20,HE220A
+P05,HE240B
+P23,NaN
+P04,HE200A
+P01,HE300B

Course Notes/steel_profiles.csv

@@ -0,0 +1,23 @@
+Profile,h[mm],b[mm],Iy[mm4],Wel_y[mm3],g[kg/m]
+HE100A,96,100,3490000,72.8,16.7
+HE120A,114,120,6060000,106,19.9
+HE140A,133,140,10300000,155,24.7
+HE160A,152,160,16700000,220,30.4
+HE180A,171,180,25100000,294,35.5
+HE200A,190,200,36900000,389,42.3
+HE220A,210,220,54100000,515,50.5
+HE240A,230,240,77600000,675,60.3
+HE260A,250,260,104500000,836,68.2
+HE280A,270,280,136700000,1010,76.4
+HE300A,290,300,182600000,1260,88.3
+HE100B,100,100,4500000,89.9,20.4
+HE120B,120,120,8640000,144,26.7
+HE140B,140,140,15100000,216,33.7
+HE160B,160,160,24900000,311,42.6
+HE180B,180,180,38300000,426,51.2
+HE200B,200,200,57000000,570,61.3
+HE220B,220,220,80900000,736,71.5
+HE240B,240,240,112600000,938,83.2
+HE260B,260,260,149200000,1150,93.0
+HE280B,280,280,192700000,1380,103.0
+HE300B,300,300,251700000,1680,117.0