At last, composing messages with attachments is possible!!

It is a really simple implementation but I think it will be enough for a begining. Users can add multiple attachments with a message, each attachment must not be larger than a customizable limit.

see #38

lib/parameters.py

@@ -87,7 +87,7 @@ def save_admin(name, value, app=None):
         p = Parameter()
         p.name = fullname
     if p.value != value:
-        p.value = str(value).encode("string_escape")
+        p.value = str(value).encode("string_escape").strip()
         p.save()
     return True
 
@@ -105,7 +105,7 @@ def save_user(user, name, value, app=None):
         p.user = user
         p.name = fullname
     if p.value != value:
-        p.value = str(value).encode("string_escape")
+        p.value = str(value).encode("string_escape").strip()
         p.save()
     return True