purl 6.x-1.0-beta11

Bug fix release of PURL. This release fixes compatibility issues with the 1.4 release of ctools.

• Retain query string parameters when using views exposed filters.
• Ensure subdomain processor doesn't eat a single domain part.
• #749296 by nquocbao: Fix for saving the same modifiers with different providers.
• #592324 by TKS, yhahn: Fix and simplify subdomain, domain handling.
• #729862 by haffmans: Implement hook_boot() to ensure detection by url_alter.
• Fixes to default form values for domain variable.
• Fixes for subdomain handling.
• by webflo: Use example_provider as key in hook_purl_modifiers example.
• Declaration 'use hooks' for CTools plugin API.