Django-sitetree

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* `{{ STATIC_URL }}` is replaced with `{% static %}` admin templates.
* Fixed `sitetreeload` management command compatibility with py3.
* Fixed `sitetreeload` management command compatibility with Django 1.7.

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+ Added support for both South and Django 1.7 migrations.
+ `register_dynamic_trees()` now accepts `reset_cache` kwarg.

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+ Django 1.7 ready.
+ `item()` now accepts `access_by_perms` and `perms_mode_all`.
* Fixed `SiteTreeError` for `TEMPLATE_CONTEXT_PROCESSORS` when not `DEBUG`.
* Fixed `this-siblings` item alias behavior.
* `register_dynamic_trees()` refactored to a less-brackets style.
* `LazyTitle` objects made py3 compatible.
* Fixed "Save and continue editing" on Tree Item yields "does not exist" error.
* Global context is change is now tested with `id()`.

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+ Added `breadcrumbs-title` template.
+ `UNRESOLVED_ITEM_MARKER` introduced to settings.
+ Added Django 1.6 test rules.
* Fixed django 1.4.10 issue (see 116).
- Dropped deprecated `sitetree_url` tag arguments.
- Dropped deprecated template var support in sitetree item URL field.

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+ Fixed bug when running sitetree with django version 1.4.10

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+ Implemented runtime defined (dynamic) trees (see 105).
+ Added Foundation breadcrumbs template.
+ Added Semantic UI templates.
* Fixed `DatabaseError: integer out of range` generated on `sitetree_resync_apps` (see 105).
* Sitetree for apps module name made adjustable and defaults to `sitetrees` to prevent module name clashes.