Borg-localrole

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- Avoid polluting test environment with extra adapter registrations.
[davisagli]

- Use `Testing.ZopeTestCase.placeless` instead of `zope.app.testing.placeless`.
[hannosch]

- Adjusted test setup for Plone 5.
[hannosch]

- Added the `replace_local_role_manager` method formerly found in CMFPlone.
[hannosch]

- Standardize package documentation and remove invalid license files.
[hannosch]

- Declare test dependencies in an extra and fixed deprecation warnings
for use of Globals.
[hannosch]

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- Specify package dependencies.
[hannosch]

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- Support caching of allowed local roles on the request.
[witsch]

- Renamed the default adapter to "default" so that people don't
accidentally override it with an unnamed adapter. Overriding the default
should be possible, but is a marginal use case. If it's overridden but
not replicated properly, all sorts of problems can result.
[optilude]

- Added exportimport.zcml which registers TitleOnlyExportImport for
WorkspaceLocalRoleManager; this allows local roles plug-in to be
imported and exported as part of a GenericSetup profile.
[rafrombrc]

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- Baseline for Plone 3.1