Added note to indentedSyntax in read.me to clarify that node-sass can compile…

Added note to indentedSyntax in read.me to clarify that node-sass can compile mixed libraries even with this set to false.

README.md

@@ -183,6 +183,8 @@ Default: `false`
 
 `true` values enable [Sass Indented Syntax](http://sass-lang.com/documentation/file.INDENTED_SYNTAX.html) for parsing the data string or file.
 
+__Note:__ node-sass/libsass will compile a mixed library of scss and indented syntax (.sass) files with the Default setting (false) as long as .sass and .scss extensions are used in filenames.  
+
 ### indentType (>= v3.0.0)
 Type: `String`
 Default: `space`