1.1.15 release.
SecurityManager adjustments
Updated changelog, upgrade, added option to disable keys validation, added back automatic key generation
Fixed accidental removal
Removed missing key test
Fixed caching for table schema with prefix
Tests for cached table schema with prefix
Minor formats
Added changelog line
Merge pull request #3551 from Maxsh/master

Fixed caching for table schema with prefix
Enh #3533: Added Yii and YiiBase classes to composer autoloader.

close #3539, fixes #3533
CModule::setModules() fixed to not override existing moduleId aliases

orginal commit by @klimov-paul in #2931

close #2931, fixes #2917
throw exception on empty data for multi insert command

fixes #1372
Revert "Fixed caching for table schema with prefix"
Merge pull request #3559 from yiisoft/revert-3551-master

Revert "Fixed caching for table schema with prefix"
Updated the CMemCache test case such that we can also test with memcached
Merge pull request #3562 from bkwint/master

Updated the CMemCache test case such that we can also test with memcached
bug: characters translation

http://cn2.php.net/manual/en/function.strtr.php
Merge pull request #3569 from jmxhit/patch-1

bug: characters translation
CHANGELOG for #3569