REVERT "Fix some naming conventions and use abort for all Rust functions, and disable the rust linters for now, re #256"

This reverts commit f412b4f96f.

Conflicts:
	doc/ale.txt

ale_linters/rust/rustc.vim

@@ -7,9 +7,6 @@ endif
 
 
 function! ale_linters#rust#rustc#HandleRustcErrors(buffer_number, errorlines) abort
-    " FIXME: Fix this linter
-    return []
-
     let l:file_name = fnamemodify(bufname(a:buffer_number), ':t')
     let l:output = []