Pontoon: Update Bulgarian (bg) localization of AMO

Localization authors:
- :stoyan <stoyan@gmx.com>

locale/bg/LC_MESSAGES/django.po

@@ -7,7 +7,7 @@ msgstr ""
 "Project-Id-Version: addons\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
 "POT-Creation-Date: 2017-10-11 18:22+0000\n"
-"PO-Revision-Date: 2017-10-17 08:19+0000\n"
+"PO-Revision-Date: 2017-10-17 13:24+0000\n"
 "Last-Translator: :stoyan <stoyan@gmx.com>\n"
 "Language-Team: none\n"
 "Language: bg\n"
@@ -2258,7 +2258,7 @@ msgid "Release"
 msgstr "Издание"
 
 msgid "Change"
-msgstr "Промени"
+msgstr "Променяне"
 
 msgid "Compatible"
 msgstr "Съвместима"
@@ -7818,7 +7818,7 @@ msgid "Daily Users by Date"
 msgstr "Потребители дневно по дата"
 
 msgid "What are daily users?"
-msgstr ""
+msgstr "Какво означава „потребители дневно\"?"
 
 msgid ""
 "<h2>What are daily users?</h2> <p> Themes installed from this site check for updates once per day. The total number of these update pings is known as Active Daily Users, or the total number of "