Update datefield.md

Removed ; at the end of ->setConfig('dmyfields', true) in the three chain example. Is confusing for new users/developers who are not aware of how to chain methods.

Closes #3006
Update dataobject.md

This page is grid-field not gridfield.
Merge pull request #3009 from scottmcmurray/patch-1

Update dataobject.md
Info about getting set up using composer and MAMP

Added by request of Gábor Novoszádi from community feedback and thanks to the gist from @kkirsche. I have supplied a link to the gist as it is well written, with permission we may look to rework for direct inclusion at some point :)
Docs / Tests for Director::absoluteURL
Merge pull request #3011 from tractorcow/pulls/absurl

Docs / Tests for Director::absoluteURL
Prevent IE errors on hidden login forms

In order to focus a field, it needs to be visible,
which can't be guaranteed on a core level by the login form JavaScript.
Optionally check for visibility via jQuery if it exists,
and allow explicit disabling of this behaviour via a unique identifier.
Add 3.0.10 upgrade docs
Merge pull request #3010 from camfindlay/patch-3

Info about getting set up using composer and MAMP
FIX - missing link url for composer

My bad, have amended this.
Merge pull request #3014 from camfindlay/patch-4

FIX - missing link url for composer
Delete formatted images after image upload

This change fixes an issue where old/existing formatted images are used
when a filename is reused (by overwrite or by coincidence), regardless
of if the file contents have changed. To users this mainly manifests
as a file overwrite appearing not to work; the thumbnails in the CMS
show the original image until regeneration is forced.

Calling Image::deleteFormattedImages() after image upload ensures that
no stagnant formatted images will be used.
Merge remote-tracking branch 'composer/3.0.10' into 3.1.4
3.1.4 upgrading docs
BUG Fix Date and SS_DateTime::FormatFromSettings
This issue is caused by the odd default behaviour of Zend_Date, which attempts to parse yyyy-mm-dd format date and times as though they were yyyy-dd-mm.
Update upgrading docs 3.1.4
Merge remote-tracking branch 'origin/3.0' into 3.1
Merge remote-tracking branch 'origin/3.1.4' into 3.1
FIX change action variable source to getViewer

Previously we were using the request to get the action parameter. However for custom URL structures and nested controllers, this won't work and causes template selection to break.
Merge pull request #3013 from silverstripe-iterators/pulls/login-form-js

Prevent IE errors on hidden login forms