Add integration for sml

Author: Tommaso Previero

.gitignore

@@ -3,3 +3,5 @@ npm-debug.log
 node_modules
 examples/test/
 .sass-cache/
+.idea
+*.iml

examples/helloworld.sml

@@ -0,0 +1,3 @@
+
+(* My Hello World program *)
+print "Hello World!"

lib/grammars/ml.coffee

@@ -1,4 +1,5 @@
 {command} = GrammarUtils = require '../grammar-utils'
+path = require 'path'
 
 windows = GrammarUtils.OperatingSystem.isWindows()
 
@@ -28,3 +29,17 @@ module.exports =
         file = filename.replace /\.re$/, '.native'
         GrammarUtils.formatArgs("rebuild '#{file}' && '#{file}'")
     }
+
+  'Standard ML':
+    'File Based': {
+      command: 'sml'
+      args: ({filename}) -> return [filename];
+    }
+
+    'Selection Based': {
+      command: 'sml'
+      args: (context) ->
+        code = context.getCode()
+        tmpFile = GrammarUtils.createTempFileWithCode(code, '.sml')
+        return [tmpFile]
+    }