Add a new script to compile resources.

- No more dependency to reswrap binary (everything is done in python)
- Resource strings can be directly accessed.
  As side effect, it add a check at compilation if the resource is
  declared and compiled in the binary.
- The resource content can be overwritten at runtime with a env variable.

There is also few clean in the static as some files shoul be in the tools
directory.

The compile_resource script is install to let other project use it.

meson.build

@@ -49,6 +49,8 @@ all_deps = [thread_dep, libicu_dep, libzim_dep, ctpp2_dep, xapian_dep, pugixml_d
 inc = include_directories('include')
 
 subdir('include')
+subdir('scripts')
+subdir('static')
 subdir('src')
 
 pkg_mod = import('pkgconfig')