Added tools URLs that are requested through "index.php" to the robots.txt.
Fixes the display ordering when a page is duplicated.
Fixed dialog not opening on consecutive page dropping.
Tell Zend to not parse messages.po files

Zend tries to load messages.po files at every call. Let's avoid this,
since the files to be loaded are called messages.mo, but usually
developers keep their uncompiled version in place.

Please note that since parsing messages.po fails, they are not cached, so
Zend tries to load them at every page call.
Ignore also hidden files/directories
remove unused installer code
make sure permission keys are imported just once
Add Message-ID header to sent emails

The Message-ID header should be present in sent emails.
If it's missing many spam detectors mark emails as spam.
Show download URL after upload too

When vieweing properties of a file we see its "Download URL".
Let's show it even just after having uploaded it.
Fix some multibyte characters be damaged in translation task
set default timestamp value
updating version number
Merge branch 'master' of github.com:concrete5/concrete5
Merge pull request #1726 from mlocati/add-messageid-header

Add Message-ID header to sent emails
fixing typo
Merge pull request #1703 from ahukkanen/robots_txt_fix

Update to robots.txt
Merge pull request #1707 from ahukkanen/display_order_fix

Display order fix on page duplication
Merge branch 'master' of github.com:concrete5/concrete5
merge fix
Merge pull request #1716 from mlocati/ignore-message-po-files

Tell Zend to not parse messages.po files