- save lang_conf in loader. - tabs to spaces in loader.hpp.
- add some comments and formatting.
- more comments.
- more comments.
- set_lang/unset_lang.
- loader return node_a.
- add index field in node_a.
- set import index in tree.
- print file when checks fail.
- add i (import) to lang_conf and parser.
- corrected 'verbose' behaviour.
- add operator== to lang_conf.?pp
- add check_langs() to loader.?pp
- improved error messages related to @lang permissions by testing all posible sentences.