Remove reliance on streams

tee.nim

@@ -1,14 +1,14 @@
-import cligen, os, streams
+import cligen, os
 import common
 
 proc main(files:seq[string]) =
     var
-        fileStreams:seq[Stream]
+        fileObjs:seq[File]
     for file in files:
-        fileStreams.add(newFileStream(file, fmWrite))
+        fileObjs.add(open(file, fmWrite))
     for line in lines(stdin):
         writeLine(stdout, line)
-        for fStream in fileStreams:
-            writeLine(fStream, line)
+        for file in fileObjs:
+            writeLine(file, line)
 
 dispatch(main, version=("version", nimbaseVersion))