Make database warning translatable
Improve Private Feed setting description.

This is how they do it in core :wink:
Fix activity widget text
Fix header text of select elements on the list table

Was #172
Use _x() instead of __() appropriately

This will give translators better context
Provide .pot file

This file should be used by translators to update their translations.

For example, using POEdit:
1. Fire up POEdit
2. Open your language's current .po file
3. Click **Catalog** > **Update from POT file**
4. Translate away and save.
Update .po file based on new .pot
Indonesian Translation

Depends on #176
Update Polish language to use new placeholders
Add support for IPv6 in Stream table

Appartenly filter_input's FILTER_VALIDATE_IP validates IPv6 as well, so only that change is needed
Resolves #146
[issue-49] Don't prefill authors if too many
Merge branch 'develop' into issue-49
[issue-49] Prepare filters to use Ajax
[issue-49] Send Ajax request
[issue-49] Perform Ajax author search
[issue-49] Pass filter name to Ajax request
[issue-49] Change method name to more general
[issue-49] Set preloaded authors limit
Fix minor typo
Stay on current tab after settings are submitted