splitting the book into four parts
Merge pull request #95 from gAmUssA/master

added ch6.5 to build
addressed the comments to AJAX/JSON chapter
addressed the comments on ch3
modified TOC
- merged with upstream changes
- small fixes to ch8 and ch6.5
added asciidoc.conf to support compatibility with asciidoc

https://github.com/asciidoctor/asciidoctor/blob/master/compat/asciidoc.conf
addressed most of the editor's comments for ch 8.
added bower and node sections