BUG Text::BigSummary() fails with undefined $data when $plain = false
FIX: Prevent JSON response showing when re-opening closed tab (fixes silverstripe/silverstripe-cms#1121)
BUG File attach handler is no longer accessible if attachment is disallowed or disabled
fixed and tested object has_extension
Merge pull request #3575 from kinglozzer/pulls/fix-reopen-tab-response

FIX: Prevent JSON response showing when re-opening closed tab (fixes silverstripe/silverstripe-cms#1121)
Merge pull request #3484 from dnadesign/object_has_extension_fix

fixed and tested object has_extension
Session keys are case sensitive
Merge pull request #3578 from g4b0/patch-4

Session keys are case sensitive
Merge pull request #3576 from tractorcow/pulls/3.1/upload-attach

BUG File attach handler is no longer accessible if attachment is disallowed or disabled
Merge pull request #3521 from halkyon/bigsummary_plain_fix

BUG Text::BigSummary() fails with undefined $data when $plain = false
Moving NoHTML function from Text to StringField

This change will make the NoHTML function available for Varchar fields in particular.
Improvements to nginx and HHVM installation docs

 * Fix a few missing packages in `apt-get install` command
 * Add command to start HHVM automatically on boot
 * Remove unnecessary `sendfile on` (already in /etc/nginx/nginx.conf)
belongs_many_many are now translatable
Merge pull request #3582 from g4b0/3581-translate_belongs_many_many

belongs_many_many are now translatable
Merge pull request #3580 from halkyon/hhvm_install_docs_cleanup

Improvements to nginx and HHVM installation docs
Added loading and disabled user feedback on batch actions button for cms issue 441
Added batchactions go button states to include user feedback for cms issue 411