Changed wording
Added info what to visit GH for
Added a quick facts box
Changed style and wording
Nice.. Added Redis too..
Made it clearer that channels need no programming nor config edits
Changed wording again
In case it wasn't clear what AJAX is
Now I think the wording is correct
Fixed typo
Fixing typos
Started adding a 'What is ESB anyway?' chapter
Added a chapter on ESB and SOA
Renamed the chapter
Fixing typos and style
Fixing style and typos
Fixing typos and adding clarifications