Fixed gramma and external links
Fixed gramma and external links
Fixed gramma and external links
Fixed grammar and external links
Fixed grammar and external links
Merge pull request #8 from ecasali/modify_it_topic5

Modify it topic5
Merge pull request #13 from lk108/master

some small corrections
Fixed grammar, fixed links, fixed spacing
Fixed grammar, fixed links, fixed spacing
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