change sinatra.md to ReadMe.md
relable Sinatra to IntroSinatra
rename Sinatra_day_2 to MoreSinatra
move MoreSinatra into SinatraRelated
rename SinatraRelated/MoreSinatra/more_sinatra.md to SinatraRelated/MoreSinatra/ReadMe.md
rename SinatraRelated/MoreSinatra/more_sinatra.md to SinatraRelated/MoreSinatra/ReadMe.md