First commit of partial RosettaCode contents.

Pushing this for testing purposes. Lots of work still needed.

Task/Comments/Fortran/comments-2.f

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+C     If compiled in debugging mode, print the current value of I
+D     PRINT *, I

Task/Comments/Fortran/comments-3.f

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+real :: a = 0.0   ! initialize A to be zero

Task/Comments/Fortran/comments-4.f

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+?? if (.false.) then
+do while (oh_no)
+   a = bad_news()
+   b = big_mistake()
+   c = gigo()
+end do
+?? end if

Task/Comments/Fortran/comments.f

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+C     This would be some kind of comment
+C     Usually one would avoid columns 2-6 even in a comment.