Improve package/folder/file names to be able to support several file formats
[hpl] Add support of honest-profiler

See https://github.com/RichardWarburton/honest-profiler
[pep8] Remove minor warnings
[hpl] end-of-content can occurs before end-of-file.

If marker is 0 then content is over.
Add stackcollapse-hpl to the documentation