Made changes to ch_preface.asciidoc
Merge branch 'master' of https://atlas-server.oreilly.com/git/1234000000310
addressed the editor's comments in Preface and Introduction
addressed most of the editors' comments to ch1
Finished working with ch1 editor's comments
Started working on comments to ch2
completed addressing editor's comments to ch2
fixes in ch7 after tech editor review
Merge pull request #93 from gAmUssA/master

fixes in ch7 after tech editor review
addressed half of the editor's comments to Ext JS chapter
small refactoring in chapter. moved section on tools (node, npm, bower) to another place
Merge pull request #94 from gAmUssA/master

small refactoring in chapter. moved section on tools (node, npm, bower) ...
finished responding to ch6 comments, introduced a new chapter 6.5 for selecteted productivity tools
removed appendix and added ch6.5 to book.asciidoc
splitting the book into four parts
added ch6.5 to build
Merge pull request #95 from gAmUssA/master

added ch6.5 to build
wording fix on Chap 9