vimrc: rust ftplugin config

vimrc

@@ -68,6 +68,9 @@ nmap <F12> :SyntasticReset<cr>
 let g:ctrlp_map = '<c-o>'
 let g:ctrlp_match_func = {'match': 'pymatcher#PyMatch'}
 
+let g:rust_recommended_style = 0
+let g:rust_fold = 1
+
 filetype plugin indent on
 syntax on
 highlight Folded ctermbg=black