Simplify and document the config key for toggling language defaults

Closes #33

README.md

@@ -83,6 +83,9 @@ let g:NERDCompactSexyComs = 1
 " Align line-wise comment delimiters flush left instead of following code indentation
 let g:NERDDefaultAlign = 'left'
 
+" Set a language to use its alternate delimiters by default
+let g:NERDAltDelims_java = 1
+
 " Add your own custom formats or override the defaults
 let g:NERDCustomDelimiters = { 'c': { 'left': '/**','right': '*/' } }
 ```