BookElement rendering (in progress)
Merge branch 'master' into beta
better intro style
Merge branch 'master' into beta
synchronisation with intro branch
Merge branch 'master' into beta
synchronisation with intro branch
Merge branch 'master' into beta
sync with intro branch
Merge branch 'master' into beta
book popup layouts
Merge branch 'master' into beta
catalog => catalogue
Merge branch 'master' into beta
color => colour
Merge branch 'master' into beta
English intro
Merge branch 'master' into beta