Remove some functions which were rendered trivial by xiaq's changes. Make io_file_t take its path directly. Make io_buffer_t no longer use a shared_ptr for its data.
Big cleanup of env_set. Changed var_table_t to use direct var_entry_t instead of pointers. Changed some ints to bools.
Rearrange some variables for possibly better alignment. int -> bool
Added reference to packages built on OBS repository in README.md
Use double quotes in eval.fish
Fix typo