some git workflow
try telling it it is bash
Mandeep Intro blog
Added initial post and graphs
Merge pull request #22 from bwelsh/initpost

Added initial post from @bwelsh
fix delimiters on gg link
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Darren Xing intro
Merge pull request #23 from zx2160/gh-pages

Darren Xing intro
Merge pull request #20 from msingh4674/gh-pages

Mandeep Intro blog
added the txt file Andy_Cao_intro file
move to follow naming convention (see comment on #14)
fix encoding cp1252 to utf8 for #14