Added comments

If you like it.

I also though about Units, e.g. there is Modelica.SIunits.TimeAging for alpha and gamma, but no specific TimeAging for beta and delta.
Added comments
Removed start values since they are not required here.

Please double-check!
Added comments
Add list of identified examples
Merge branch 'master' of https://github.com/xogeny/ModelicaBook
Fix damping term
Merge branch 'master' of https://github.com/xogeny/ModelicaBook
Adding the pdf rule also to the .Phony listing

plus some space corrections
Adds a deploy rule for the PDF and epub formats.
Revert "Add list of identified examples"

This reverts commit f4afb477953815c4b9eae6348042de0eaf5c47e8.
Fixed syntactic error
Merge pull request #122 from tbeu/patch-it

Fix Italian translation
Merge pull request #121 from dietmarw/deploy-print

Deploy print
Fix typos
Fix typo
Add right parenthesis
Add right parenthesis
Merge pull request #123 from tbeu/patch-a

Fix typos
Merge branch 'master' of https://github.com/xogeny/ModelicaBook