BUG Clean up the logOut and session destructon routines.
BUG: Treedropdowns broken inside togglecomposite fields (fixes #1945)

* Removed positioning javascript from treedropdownfield
* Set parent to be relatively positioned and overflow to visible
Removes PHPCS env from Travis build
Merge pull request #1975 from adrexia/treedropdown-inside-toggle-1945

BUG: Treedropdowns broken inside togglecomposite fields (fixes #1945)
FIX: exclude directory from available themes when underscore is first character

Change FALSE to lowercase
Merge pull request #1980 from feejin/bugfix-ignore-underscored-themes

FIX: exclude directory from available themes when underscore is first character
BUGFIX: Pages set as 'deletedindraft' were allowed to be published through CMS batch-actions leaving an empty title in the SiteTree.
FIX: Form::set_current_action() never gets called.
Regression due to previous patch

Fixing installer regression due to patch #1972
FIX #1971: Check if the search term is set
FIX: UnsavedRelationList did not call its constructor

This resulted in Object extensions not working for it, and methods not existing
where they should have.  It also resulted in poor error messages appearing when
thrown from Object since $this->class was empty since the constructor was never
called in Object.
Merge pull request #1992 from jthomerson/fix_unsaved_relation_list_constructor

FIX: UnsavedRelationList did not call its constructor
Merge pull request #1990 from JayDevlin/1971-text-contextsummary

FIX #1971: Text->ContextSummary
Fix misleading composer link

Fix misleading composer link
Merge pull request #1995 from ss23/patch-2

Fix misleading composer link
Merge pull request #1986 from phptek/bug/099

BUGFIX: Pages set as 'deletedindraft' were allowed to be published throu...
Merge pull request #1988 from uniun/patch-3

FIX: Form::set_current_action() never gets called.
Merge pull request #1989 from dhensby/patch-environment-regression

Regression due to previous patch
Merge pull request #1994 from mateusz/logout-cleanup

BUG Clean up the logOut and session destructon routines.
OEmbed resize on correct attrs (fixes #1950)