Commit Briefs
some headers cleanup
try to not include headers from headers, and remove some redundant include. This helps in modularizing the codebase and also helps during incremental compilations.
include compat.h explicitly in all files
don't do it in telescope.h, remove telescope.h from gencmd.awk and sort the headers in parse.y while here.
move all the sources back in the root directory
subdir is just messier for no good reason