Fix errors while compiling with dub build

Fix: wrong file names.
Fix: replace LF by CRLF.
Fix: allow warnings in dub config.
Fix: little hack to workaround rvalue refences issue in dlib.image.filters.morphology.
Add: Signal2D.divide(Signal2D img), needs cheking.

Also there are some warnings while compiling which need to be fixed. I have added "allowWarnings" option to dub config to get it compile for now.