keepassx2pass: friendly title field

This patch removes several special characters while attempting to preserve
as much meaning in the filename as possible. These changes are made to the
KeepassX title before it is used as a file password store filename:

   - Spaces between words in file names are replaced with camelCasing.
   - The characters \ | ( ) are each replaced with a hyphen.
   - Trailing hypens are removed.
   - @ is replaced with "At"
   - ' is removed

contrib/keepassx2pass.py

@@ -5,13 +5,36 @@
 # This file is licensed under the GPLv2+. Please see COPYING for more information.
 
 import sys
+import re
 
 from subprocess import Popen, PIPE
 from xml.etree import ElementTree
 
+def space_to_camelcase(value):
+    output = ""
+    first_word_passed = False
+    for word in value.split(" "):
+        if not word:
+            output += "_"
+            continue
+        if first_word_passed:
+            output += word.capitalize()
+        else:
+            output += word.lower()
+        first_word_passed = True
+    return output
+
+def cleanTitle(title):
+    # make the title more command line friendly
+    title = re.sub("(\\|\||\(|\))", "-", title)
+    title = re.sub("-$", "", title)
+    title = re.sub("\@", "At", title)
+    title = re.sub("'", "", title)
+    return title
+
 def path_for(element, path=''):
     """ Generate path name from elements title and current path """
-    title = element.find('title').text.replace("/", "|")
+    title = cleanTitle(space_to_camelcase(element.find('title').text))
     return '/'.join([path, title])
 
 def password_data(element):