Remove multiline comments

Julia introduced "#=" and "=#" as the delimiters
for multiline comments.
Fix julia comments in russian version
Merge pull request #569 from ggarza/julia_comments

Remove multiline comments in julia
Add paragraph about multiline commments in julia
Add comment about nesting julia multiline comments
Merge pull request #570 from ggarza/julia_comments

Add paragraph about multiline commments in julia