fix absolute import

converters/reveal.py

@@ -1,8 +1,8 b''
 from __future__ import absolute_import
 
-from converters.html import ConverterHTML
-from converters.utils import text_cell
-from converters.utils import highlight, coalesce_streams
+from .html import ConverterHTML
+from .utils import text_cell
+from .utils import highlight, coalesce_streams
 
 from IPython.utils import path
 from markdown import markdown
@@ -245,4 +245,4 b' class ConverterReveal(ConverterHTML):'
 
     def optional_footer(self):
         optional_footer_body = self.template_split()
-        return optional_footer_body[1] + ['</body>', '</html>']
  No newline at end of file
+        return optional_footer_body[1] + ['</body>', '</html>']