* Create multiple components library. These depend on the core code and
are used by multiple frontends.
* Clean up the filters declaration by moving them to a common header in
`components/filters/filters.h`.
* Clean up the include guards and include orders.
* Fix the modified paths in `src/debian/copyright` to match their new
location.
Switch usage of std::optional to nonstd::optional for now because of an
error from the Mac builder script, I cannot reproduce the problem yet
but will try to fix it later, it may not be fixable when targeting 10.7.
The header is from:
https://github.com/martinmoene/optional-lite
.
Usage is about the same, to include:
`#include "nonstd/optional.hpp"`
Then use nonstd::optional and nonstd::nullopt instead of the std::
counterparts.
Signed-off-by: Rafael Kitover <rkitover@gmail.com>
Fabrice de Gans