Panels Hash Cache 7.x-1.x-dev, xxxx-xx-xx
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By dipen-chaudhary: Initial port of module to D7.
By phayes: Making sure we dont cache or return empty entries.
#1405900 by benclark: Adding css key fallback.
#1413320 by benclark: Fix to clear cache when site's cache is cleared.
#1441422 by jaydub: Code clean.
By phayes: Added setting to totally disable hash-cache.
By phayes: Fixed URL handling.
#1602128 by benclark: Fix for notice in case of anonymous.
#1980778 by kalabro: Fix cache not cleared after panel resave and
  panels_hash_cache_clear_cache().
#2344433 by chertzog: drush cc all ignores panels hash cache.
#2035047 by DamienMcKenna: Error: undefined index:page.
#2147747 by DamienMcKenna: Don't use the user's username, mail, roles.
By DamienMcKenna: Added a CHANGELOG.txt file.
#2397557 by DamienMcKenna: Added a README.txt file.
#2397555 by DamienMcKenna: Added a hook_requirements item about installing
  the Cache Consistency module if not using the database for caching.
#2061385 by DamienMcKenna: Option for user role granularity to allow some roles
  to behave as anonymous.
#1869874 by DamienMcKenna: Fixed compatibility problem with Panelizer.
#1920326 by bpresles, DamienMcKenna, deepakaryan1988: Add granularity option for
  Domain Access.
#2348645 by DamienMcKenna: Moved settings form to a separate file.
#2185697 by DamienMcKenna: Use the new Panels cache table.