Update how_to_structure.tex

Fix typo "youwn own" -> "your own"
Update work_together.tex

Fix typo "how how" -> "of how"
Update motivation.tex

Fix typo "some some" -> "some"
Update motivation.tex

Fix typo "curriculum\emph{,}providing" -> "curriculum, providing"
Merge pull request #5 from al-Quaknaa/patch-1

Sorry it took me a while to see this.  Thanks @FTG-003 for the bump.