Added ast_meta, added meta to ast_ident.
Added meta to ast_numeric_literal.
Renamed ast_make_meta to ast_meta_make.
Dropped underscores from ast_numeric_literal fields.
Added meta field to ast_funcall.
Added meta to ast_structe and ast_unione.
Made some ast init function parameters share lines.
Added meta field to ast_vardecl.
Added meta field to ast_bracebody.
Removed an inappropriate line.