fixed very very minor typo and installed mooculus
Merge branch 'master' of github.com:ASCTech/mooculus
Merge branch 'development'
Switching to week 6
update rack for security fix
Fixed typo in statement of derivative of secant
Merge branch 'master' of github.com:ASCTech/mooculus
update json for dos vuln fix
minor typo fixed
Merge branch 'master' of github.com:ASCTech/mooculus
fixed typo in trig
working slowly
slowly working
rails security fix
Merge branch 'development'
working slowly
next chapter is coming slowly
working
section 2 is drafted
fixed typo