Fix for staging
Version 1.4 beta
Fix for "Too many open files"
Included feature to export tape IDs and limit duplicate stage requests
Removed unused function buffer_get_next_ready_buffer()
Added list_peek_head() and LIST_ITERATE_REMOVE
Added caching of the stage list to the session handle
Added range list intersecting and filtering based upon stripe index
Eliminate duplicate stage requests
1.4 release
Merge branch 'develop'