[qfmap] Parse field info from quaked comments

Id's comments are a little inconsistent, but for the most part usable
info can be extracted. While not yet supported, Arcane Dimensions'
comments are extremely consistent (just some issues with hyphen counts
in separators), so parsing out usable info will be fairly easy. The hard
part will be presenting it.

tools/io_qfmap/script.py

@@ -26,17 +26,19 @@ class ScriptError(Exception):
 
 class Script:
     def __init__(self, filename, text, single="{}()':", quotes=True):
-        self.filename = filename
         if text[0:3] == "\xef\xbb\xbf":
             text = text[3:]
         elif text[0] == u"\ufeff":
             text = text[1:]
+        self.token = ""
+        self.unget = False
         self.text = text
+        self.pos = 0
+        self.filename = filename
+        self.line = 1
+        self.no_quote_lines = False
         self.single = single
         self.quotes = quotes
-        self.pos = 0
-        self.line = 1
-        self.unget = False
     def error(self, msg):
         raise ScriptError(self.filename, self.line, msg)
     def tokenAvailable(self, crossline=False):
@@ -102,6 +104,9 @@ class Script:
                     self.error("EOF inside quoted string")
                     return None
                 if self.text[self.pos] == "\n":
+                    if self.no_quote_lines:
+                        self.error("EOL inside quoted string")
+                        return None
                     self.line += 1
                 self.pos += 1
             self.token = self.text[start:self.pos]