In compileScripts, run base through path.join.

Allows `path.join` to do some processing on the base path
that was also happening on the full path.
Fixes: `coffee -o ./ ./`
Still broken: `coffee -o . .`

lib/command.js

@@ -55,7 +55,7 @@
         var base, compile;
         var source = _ref2[_i];
         return _result.push((function() {
-          base = source;
+          base = path.join(source);
           compile = function(source, topLevel) {
             return path.exists(source, function(exists) {
               if (!exists) {

src/command.coffee

@@ -74,7 +74,7 @@ exports.run = ->
 # '.coffee' extension source files in it and all subdirectories.
 compileScripts = ->
   for source in sources
-    base = source
+    base = path.join(source)
     compile = (source, topLevel) ->
       path.exists source, (exists) ->
         throw new Error "File not found: #{source}" unless exists