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.

scripts/meson.build

@@ -0,0 +1,4 @@
+
+res_compiler = find_program('compile_resources.py')
+
+install_data(res_compiler.path(), install_dir:get_option('bindir'))