Imio.helpers

-----------------

- Added `IMIORAMCache` using `IMIOStorage` to extend used cache duration and
improve displayed statistics
[gbastien]
- Added cache on various acl methods following `decorate_acl_methods` env variable
[gbastien, sgeulette]
- Added IIMIOLayer BrowserLayer (need to execute upgrade step to 2).
[gbastien]
- Override `caching-controlpanel-ramcache` to compute totals for `Hits`, `Misses`,
`Size` and `Entries`, display `Older entry`, do not break to display statistics
when a pickle error occurs but add a portal message.
[gbastien]
- Added parameter `ttl=0` to `cache.get_cachekey_volatile` this way a date older
than given `ttl` (in seconds) will be recomputed.
- Added 'none_if_no_user' param in `content.get_user_fullname`.
[sgeulette]
- Always return unicode in `content.get_user_fullname`.
[sgeulette]
- Added `test_helpers.ImioTestHelpers` class with useful methods from iA.delib
[sgeulette]
- Added `vocabularies.SimplySortedUsers` and modified `vocabularies.SortedUsers`
[sgeulette]
- Added `cache.get_users_in_plone_groups`
[sgeulette]
- Added `setup.load_type_from_package` to reload a single type.
Moved `workflow.load_workflow_from_package` to `setup.load_workflow_from_package`.
[gbastien]

-----------------

- Moved workflow related functions from content to workflow module.
[sgeulette]
- Added `workflow.load_workflow_from_package` to reload a single workflow.
[sgeulette]
- Be defensive in JS function `toggleDetails` if tag is not available.
[gbastien]

-----------------

- Handled unfound site in `set_site_from_package_config`.
[sgeulette]

-----------------

- Added `escaped=True` param on `xhtml.object_link`.
[sgeulette]
- Require a version of `future` recent enough so `html.escape` is available.
[gbastien]
- Added parameter `replace_not_found_image=True` to `xhtml.storeImagesLocally`,
when `True` (default) and an image could not be retrieved,
a `Not found` image will be used. This solves problem when copy/paste a private
image from another site, available in the browser because of shared
authentication but not retrievable.
[gbastien]

-----------------

- Added `get_zope_root` to get zope app.
[sgeulette]
- Added `zope_app` parameter in `set_site_from_package_config`.
[sgeulette]
- Fixed `xhtml.replace_content`, make sure the entire content is replaced
including sub tags.
[gbastien]

-----------------

- Added `NoEscapeLinkColumn` as base for link column rendering html.
Escape must be done in inherited column.
[sgeulette]
- `content.uuidToObject` will now return `None` instead an empty list if uuid not found.
[gbastien]
- Remove zope.app.publication dependency in `security.set_site_from_package_config` as it is now
removed since Plone >= 5.2.6
[aduchene]