fix write binary and non math $

remove write binary for normal write

forgott to append text when multiline dollars

converters/latex_transformer.py

@@ -63,6 +63,9 b' def remove_math_space(text):'
                 math_lines += 1
                 if math_lines > 1:
                     within_math = False
+                    ptext = ptext+text[math_start_index:index]+"\n"
+                    print 'catching up with --',text[math_start_index:index],'--'
+
         # Remember the last character so we can easily watch
         # for backslashes
         last_character = char

nbconvert2.py

@@ -128,7 +128,7 b' class NbconvertApp(Application):'
                 if not os.path.exists(out_root+'_files'):
                     os.mkdir(files_dir)
                 for key in keys:
-                    with io.open(os.path.join(files_dir, key), 'wb') as f:
+                    with io.open(os.path.join(files_dir, key), 'w') as f:
                         f.write(resources['figures'][key])
             elif self.stdout:
                 print('''====================== Keys in Resources ==================================''')