[TASK] Release typo3/ajax.php from early t3lib_div usage
[TASK] Remove empty t3lib_div file and mentions
[TASK] Remove extbase and fluid Changelog.txt

They are unmaintained and serve no purpose, changes can be
fetched from git log much better.
[TASK] Remove empty t3lib_exec, t3lib_extmgm, t3lib_extobjbase
[!!!][TASK] Remove t3lib_formmail

This class should have been deprecated for 6.0 but was forgotten.
The formmail API is heavily old school and hard coded. It is of
no use in younger projects for a long time.
The class is removed now without substitution and the according
helpermethods in TSFE deprecated, checkDataSubmission() even removed
directly because it can not be used externally.
Revert "[TASK] Remove empty t3lib_cli and t3lib_db and mentions"

This reverts commit b4551cb3 to see if it makes travis happy again.
Revert "[TASK] Release typo3/ajax.php from early t3lib_div usage"

This reverts commit f608ed0 to see if it makes travis happy again.
[TASK] Add TODO note for travis memory settings
[!!!][BUGFIX] Remove support for TCA setting 'foreign_selector'

The TCA setting 'foreign_selector' is a UI feature which can be
configured for field in a relation table, when this table
is editable using the IRRE feature. Then a selector box
is rendered making it possible to select records from a child
table.

In this scenario the relation table itself may contain other
editable fields, which should be represented by a domain model.

The latter is currently not possible with Extbase because
'foreign_selector' triggers the DataMapper to resolve a
many to many relation to the child table.

Solution is to remove this behaviour and let the DataMapper
resolve the one to many relation to the relation table.

Find a test setup at https://gist.github.com/4284545

Change-Id: I2d8366f9ce54470999c1b02ad2098359f5aaa6b3
Fixes: #10770
Releases: 6.0, 6.1
[BUGFIX] Add needed setting to handle file_references correctly

The ImageViewHelper needs the setting 'treatIdAsReference' to
handle file_references correctly.

Change-Id: I4aa8ea8e50147a7f3b8d4b5695b6d37bd4ce501f
Fixes: #43964
Releases: 6.0, 6.1
[BUGFIX] Add needed setting to handle file_references correctly

The Uri.Image ViewHelper needs the setting 'treatIdAsReference' to
handle file_references correctly.

Change-Id: Ia3df9dffd801e5f88343d60bcc352e39e89179ee
Fixes: #44222
Releases: 6.0, 6.1
[BUGFIX] Fix wrong class call causing a Fatal Error