Ensure that prioritised managed processes don't deadlock on reads
Merge branch 'master' into development
Fix a nasty bug in Supervisor branch restarts

We previously ignored the semantics of Temporary children when
performing a branch restart, thus crashing when trying to restart the
child (whose spec was previously deleted during our monitor signal
handling code).

We also failed to strip transient children from the list of processes
to restart, which would lead to a transient child (*and* its branch)
being restarted incorrectly if it exited normally.
Fix various branch restart bugs for temporary and transient children
Fix a counting error in supervisor's stats reporting
ManagedProcess documentation improvements and additional exports
Improved timeout handling for Managed Process
Cosmetic (ish)
Merge branch 'development' into resource-pool
Add a test case for Pools