Release-0.7.7

This is a bugfix and minor version enhancement release.

• #817 allows DispatchQueue types to return Deferred
• #820 eliminates the GlobalContextDesignation type and #819 eliminates the AutoPacketProfiler
• #822 corrects some semantic issues with autowiring::once
• #824 makes the aborted status in DispatchQueue into an observable autowiring::signal
• #831 corrects a problem where notifications are requested for unuttered base types
• #825 bumps the minimum required CMake version to 3.4
• #828 adds an override of ContextMember::GetSelf suitable for const contexts
• #832 makes current context changes a bit more efficient
• #834 moves the onRunning signal to be asserted a bit later in the initialization cycle, after all children have already received this signal
• #827 ensures the correct context is always assigned in CoreContext::NotifyWhenAutowired
• #826 fixes a problem with factory new on types with private ctors
• #837 makes the cause of null Autowired dereferences a little clearer
• #838 and #839 fix and update Arm/Android build instructions and procedures