FIX postgres can filter on non text fields

Filtering non text fields in postgres would cause the SQL to fail. This
casts the field to text before the LIKE filter.
Fixed RSS example
Merge pull request #2654 from icecaster/patch-3

Fixed RSS example
FIX Dont pop up basic auth dialog when trying to flush and isDev=1, just redirect to Security/login like normal
Merge pull request #2242 from torleif/3.0

FIX postgres can filter on non text fields
$manifest needs to be global for Deprecation.
Fix autocompletion on ::create and ::strong_create

This ties in with IDEs that can autocomplete the LSB class when you @return static.
BUG: Fixed out of date RFC 4180 URL

BUG: Fixed out of date RFC 4180 URL
Updated filename to ref 'Holder' not 'Page'
Updated filename to reference 'Holder' not 'Page'
Merge pull request #2826 from mattkirwan/patch-2

Updated filename to reference 'Holder' not 'Page'
Merge pull request #2825 from mattkirwan/patch-1

Updated filename to reference 'Holder' not 'Page'
NEW: Correcting the JSRunnerTest template comments
Docs for whitespace fixes
Merge pull request #2828 from silverstripe-rebelalliance/JSRunnerTest

NEW: Correcting the JSRunnerTest template comments
Merge pull request #2820 from nikrolls/patch-1

Fix autocompletion on ::create and ::strong_create
Merge pull request #2830 from hafriedlander/fix/flush

FIX Dont pop up basic auth dialog when trying to flush and isDev=1
NEW: Updating out of date URLs in the framework source code and docs
Add Behat step to click on a row in the first GridField table.
Add behat test for security permission checkboxes.