[devhelp] (10 commits) Non-fast-forward update to branch wip/swilmet/misc-improvements

[Sébastien Wilmet <swilmet src gnome org>]

The branch 'wip/swilmet/misc-improvements' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  e27310b... Remove some useless #includes
  dc2c1de... book: better document instance variables
  d30b481... book: deprecate unused comparison functions
  4aa9bb0... book-manager: connect to DhBook signals with g_signal_conne
  a734086... book-tree: use g_signal_connect_object()
  98e21e0... book-tree: spring clean-up
  009e6e6... Update .gitignore
  9163f78... keyword-model: spring clean-up

Commits added to the branch:

  4d67506... Remove some useless #includes
  13e5b52... book: better document instance variables
  252538e... book: deprecate unused comparison functions
  79312eb... book-manager: connect to DhBook signals with g_signal_conne
  c8b7337... book-tree: use g_signal_connect_object()
  d3ccd80... book-tree: spring clean-up
  9a49394... Update .gitignore
  34568d2... keyword-model: spring clean-up
  9dc9864... sidebar: better variable and function names for idles
  54217a3... sidebar: dispose() before finalize()