Fix newline parsing (kmille#33)

UG has apparently started migrating the tab format from
the CRLF line-ending format to the LF line-ending format.

Thus, some tabs now appear broken. This change regards
single LF characters as newlines as well and fixes
the broken tabs.

freetar/ug.py

@@ -77,6 +77,7 @@ def __repr__(self):
     def fix_tab(self):
         tab = self.tab
         tab = tab.replace("\r\n", "<br/>")
+        tab = tab.replace("\n", "<br/>")
         tab = tab.replace(" ", "&nbsp;")
         tab = tab.replace("[tab]", "")
         tab = tab.replace("[/tab]", "")