notes.md: describe the one-way-delay measurements
notes.md: move Fig. 6 inside section 3.3

It should be in the middle of section 3.3 and not
at the bottom of section 3.3
notes.md: tweak previous
notes.md: Section 3.3: include into -> include in
notes.md: Section 3.3: give names to packets
notes.md: be more precise
notes.md: Section 3.3: try to center Fig. 6
notes.md: Section 3.3 conclusion: be more precise
notes.md: update version
Merge pull request #1 from bassosimone/feature_notes_v0.0.4

Update lecture/notes.md to version 0.0.4