Format html sources

- Add indentation to show structure.
- Put <br /> tags at beginning of lines (to emphasise the difference to
  other long wrapped lines).
[squash] 2013->2014
update setup instructions & exercise intro
tried with released e4 tools version -> NPE in xmi editor
until pom adding
completed text update of exercise 1
code changes after first exercise
updated import in ex 2; repo for tycho connector; "we'll"
completed text of ex 2
changes to ws at start of ex 3
project changes to ws at start of ex 4
project changes to ws at start of ex 5
project changes to solution
changes required to make the solution pass

- product editor re-arranges bundles alphabetically
images ex 2 maven-conversion to end
images first half of ex 2
updated images for ex 1
fix images in ex 2: added arrow, removed collapsed outline
updated ex 3: inline maven conversion
add project configuration recovery instructions; small fixes in ex 3