Apart from having more developer-friendly messages if the assertions go
wrong, it also prevents the assertions not being run if
`G_DISABLE_ASSERT` is defined (e.g. for performance reasons).
Previously there were no functions in the simple API that return the
matched attributes other than the secret value, while there were needs
for augumenting user input with additional information (such as
completing web forms).
This adds a set of functions which wrap secret_service_search*. Note
that the return value is a list of GHashTable not of SecretItem,
because SecretItem is a subclass of GDBusProxy, which we don't want to
expose from the simple API.
Fixes#16
Allow parallel building and testing by using a single Makefile.am
Implement parallel testing using TAP, with various drivers and
compilers living in the build/ directory.
Fix all sorts of issues that this caused, including builddir != srcdir,
leaks in tests and so on.
It would have been nice to break out all the above into separate
commits ... blush.
