Add tasks for all the new languages

Task/Conditional-structures/FreeBASIC/conditional-structures-1.freebasic

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+Dim a As Integer = 1
+If a = 1 Then
+  sub1
+ElseIf a = 2 Then
+  sub2
+Else
+  sub3
+End If

Task/Conditional-structures/FreeBASIC/conditional-structures-2.freebasic

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+Dim a As Integer = 1
+Select Case a
+  Case 1
+    sub1
+  Case 2
+    sub2
+  Case Else
+    sub3
+End Select

Task/Conditional-structures/FreeBASIC/conditional-structures-3.freebasic

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+Dim b As Boolean = True
+Dim i As Integer = IIf(b, 1, 2)

Task/Conditional-structures/FreeBASIC/conditional-structures-4.freebasic

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+Dim a As Integer = 1
+On a Goto label1, label2

Task/Conditional-structures/FreeBASIC/conditional-structures-5.freebasic

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+Dim b As Boolean = True
+If b Goto label

Task/Conditional-structures/FreeBASIC/conditional-structures-6.freebasic

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+Dim a As Integer = 1
+On a Gosub label1, label2

Task/Conditional-structures/FreeBASIC/conditional-structures-7.freebasic

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+#DEFINE WORDSIZE 16
+#IF (WORDSIZE = 16)
+  ' Do some some 16 bit stuff
+#ELSEIF (WORDSIZE = 32)
+  ' Do some some 32 bit stuff
+#ELSE
+  #ERROR WORDSIZE must be set to 16 or 32
+#ENDIF

Task/Conditional-structures/FreeBASIC/conditional-structures-8.freebasic

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+#DEFINE _DEBUG
+#IFDEF _DEBUG
+  ' Special statements for debugging
+#ENDIF

Task/Conditional-structures/FreeBASIC/conditional-structures-9.freebasic

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+#IFNDEF _DEBUG
+  #DEFINE _DEBUG
+#ENDIF