Merge pull request #14 from ecasali/modify_it_topic6

Fixed grammar, fixed links, fixed spacing
Merge pull request #15 from ecasali/modify_it_topic7

Modify it topic7
grammar correction
coding correction, grammar correction
Merge pull request #16 from lk108/master

grammar, spelling + coding corrections
update cname to be base url thing.
Merge pull request #17 from michaelrice/cname

update cname to be base url thing.