review documentation
providing link to the cheat-sheet folder won't work, reverting to cheat-sheet.html
Cherry-pick documentation from @ceeaspb, close #2049
Misc from #2049
Merge pull request #2051 from excilys/ceeaspb-documentation_proof

Documentation: Ceeaspb documentation proof
Listen to WebSocket Binary messages too, close #2043
Use a timestamp for run start, close #2034
Add Gatling version in RunMessage, close #2052
Fix test
Adopt new website layout
Setup structure for download page
Update .travis.yml after org change
Update references to excilys repos after org change
GA don't execute on localhost anyway
Update Travis' badge with new repo url
310 my love
Target 2.0.0-RC1
cheat sheet: GA, fix links
Add link to "Professional Services"
Setup 2.0.0-M3a -> 2.0.0-RC1 migration guide