Allow for disabling individual languages, closes #66

ftplugin/opencl.vim

@@ -1,3 +1,5 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'opencl') == -1
+  
 if exists("b:did_ftplugin") | finish | endif
 
 if version > 600
@@ -13,3 +15,5 @@ setlocal smarttab
 setlocal smartindent
 
 let b:did_ftplugin = 1
+
+endif