add arrow images to be compatible with django-treemenus
readme-update
Merge pull request #61 from iElectric/treemenus-compatibility

add arrow images to be compatible with django-treemenus
master to 2.4.0
Merge branch 'stable/2.4.x'
Merge branch 'stable/2.4.x'
Merge branch 'stable/2.4.x'
Merge branch 'stable/2.4.x'
Merge pull request #289 from BertrandBordage/stable/2.4.x

[Views] Don't crash when obj_id is not an integer.
added a customizable tinymce css file (and styles/img for "page break"), see #287
updated tinyMCE to 3.5.8, see #291
added class for "hidden" input fields with autocompletes, see #294
refined class for "hidden" input fields with autocompletes, see #294
fixed username with header, see #296
refined class for "hidden" input fields with autocompletes, see #294
new compressed js
docs update
Merge branch 'stable/2.4.x'
updated dev–version to 2.4.5
added white-space:pre for <pre> elements within grp-readonly, see #309