Merge branch 'S' of github.com:iverson-nate/Linear_Algebra
modifed definition 1.1.5, example 1.2 added another example
\newcommand{\ph}{\phantom{-}}
Merge branch 'master' of github.com:iverson-nate/Linear_Algebra
moved \minus to mycommands.sty
Added [term] for each definition appropriately