format latex longtables

Now pandoc uses the package longtable of latex to manage tables. The
default setup does not restrict column width. The explanation column
must be constrained to fit in the page's width.
Complete the long unfinished paragraph...
Update 01-chapter1.markdown

check for mistakes
add "sudo" by ubuntu package installation
...
Mention translated files in README

The files which are not yet started in translation should not be part of
the files in the language. Otherwise, we need to always backport the
changes to the original english to all "not yet"/"will never be"
translated files in partially translated languages.
Add table numbering to longtables
Add second chapter, to start on the most essential
Esperanto: translate a little more
Esperanto: Correct image description
Esperanto: start of chapter 2, probably the most essential chapter...
Esperanto: complete the first part of chapter 2
Change back Linŭ to Linux
Change back oŝ to osx
Esperanto: Add some new paragraphs
Esperanto: Some more paragraphs translated, useful information already present, terminology being decided...
Merge pull request #578 from LaPingvino/only-translated-files

Only translated files
Merge pull request #575 from green-big-frog/master

DE Update 01-chapter1.markdown
Merge pull request #571 from progit/pandoc_longtable

format latex longtables