Update function names in migration, clarify tints and shades are Sass variables
Update function names in migration, clarify tints and shades are Sass variables

m5o/bootstrap,tjkohli/bootstrap,zalog/bootstrap,inway/bootstrap,tjkohli/bootstrap,twbs/bootstrap,m5o/bootstrap,inway/bootstrap,GerHobbelt/bootstrap,GerHobbelt/bootstrap,zalog/bootstrap,GerHobbelt/bootstrap,zalog/bootstrap,twbs/bootstrap,coliff/bootstrap,inway/bootstrap,coliff/bootstrap