Added 'islandora_os_check' function, primarily for Windows detection.
Merge pull request #451 from ajstanley/7.x

added command to update solution pack content models
Force re-load an object when purging so we don't try to access things that no longer exist in Fedora.
Merge pull request #452 from jordandukart/7.x-whacky-waving-inflatable-arm-flailing-caching

Force re-load an object when purging so we don't try to access things th...
ISLANDORA-450 Instead of PHP_OS, now using php_uname() for OS detection.
ISLANDORA-450 Function renamed, moved to utilities.inc; now returns boolean.
no longer used template removed
better doc
Merge pull request #450 from slangerx/7.x

Windows-compatibility: New function for OS detection
Merge pull request #453 from willtp87/7.x.print_update

no longer used template removed
toggle switch for automatic deletion
travis isn't a fan of my lack of camelCase
Merge pull request #454 from qadan/7.x

toggle switch for automatic deletion
wrapped command to avoid errors for uninstalled objects