update zip
Add unzip to machine - fixes #40
Note about different vagrant path for db
paths to files & a easy exercise
Fixed WARNING: Bullet list ends without a blank line; unexpected unindent.
Fixed ERROR: Unknown target name: "try git (nice introduction to git and github)<https://try.github.io/>"
Updated Previous Trainings and Trainers sections
Merge pull request #45 from Covantec/master

More improvements (fix and update)
Merge pull request #44 from plone/work_on_views2

paths to files & a easy exercise
use api
add three exercises
fix typos and rephrase
fix exercise
add more exercises (TODO: solutions for viewlets)
typo fix
Add instance 'run' option
Extend discussion of OOD vs components a bit
Make English a bit more colloquial
Add note on PFG as not a good architecture model
Minor edits
Add a bit more buildout explanation
mr.bob note