Suggestion: Include in documentation what encoding files should have

Hi,

while playing around a bit with h5p my changes suddenly stopped working. The libraries in the development folder simply weren't loaded by h5p anymore and uploading manually created .h5p-packages didn't work because there was always something wrong with one of the json-files. It took me some time to figure out that the files in a h5p library must be encoding with UTF-8 without BOM to work. I used Visual Studio to edit the files and it automatically saved them with BOM.

I think it would be useful if this bit of information was included somewhere in the documentation for beginner developers. I guess it only applies if the tools you use automatically change the encoding of a file, but it's not really obvious. Or does this restriction not exist and my problem was something else and fiddling around has solved it in another way?

Sebastian