perl script improvement

Improvement of the perl script calculating the multiplexing delay
New file with some results of tests

VoIP and Quake3 traffic have been used
Update of the main program

The idea is that it has to fit with the new draft
(http://tools.ietf.org/html/draft-saldana-tsvwg-simplemux-00), so it has
to distinguish between the first separator and the non-first separators
Documentation file updated.
Minor update of the PDF
Update of the main C file and the readme
Merge pull request #2 from TCM-TF/develop

Develop