* Add unified backend test.

* Fix syunchronous read
* Add IOC for testing
* Add some debug output

* Move channel access control to ChannelManager.

* QtHardmon is working again.

* Intermediate commit.

* Adopt test to see what happens if connection is lost.

* Test B_6_4 passed.

* Increase timeout to be sure channel access builds up after server start.

* Destroy context if it already exists. Should only apply in tests.

* No need to publish initial value is no async read enabled.

* Cleanup and bug fix.

* Check if notifications queue is available before using it.

* Remove pointer to accessor on destruction. Remove subscr. if no accessor
is present any more.

* Fix data transfer via future queue.

* Use C++ header instead of C header.

* Remove debug output.

* Cleanup.

* Fix typo.

* Remove timeouts. Add pause test. Use pause to introduce error.

Tests are running without error.

* Add bo type (aka ENUM).

* All tests pass except 6.4.

Check all channels before leaving setForceRuntimeError method. Do not
publish initial value on activateAsyncRead, if it was already active.

* Use correct name. Not a channel but an accessor.

* Block in activateAsyncRead until all initial values are received.

All tests are passed now.

* Use test related code only in tests.

* Only use constants defined in EPICSTypes.h

* Fix array test.

* Fix compiler warning. Add lso test.

* Support reading lso.

* Add lso support.

* Use common EPICS configuration.

* Add DataDescriptor for string.

* Fix handling of true/false enum.

* Fix clang warning.

* Update documentation.

* Cleanup - remove unused members.

* Update documentation.

* Avoid multiple map searches.

* Set deleter for shared pointer.

* Do not throw in activateAsyncRead.

However this is not specified up to now in the backend specifications
what to do - wait for the initial value or do not wait.

* Fix backend tests and adopt to latest DeviceAccess API.

* Update version number.