#1977: declared CFormatter::normalizeDateValue() as protected
changelog
minor change in changelog entry
cleanup comments in `@property` annotation script
speedup phpunit tests on travis

fixes #1890
Merge pull request #1978 branch '1977-CFormatter-normalizeDateValue-protected' of https://github.com/etienneq/yii into etienneq-1977-CFormatter-normalizeDateValue-protected

* '1977-CFormatter-normalizeDateValue-protected' of https://github.com/etienneq/yii:
  minor change in changelog entry
  changelog
  #1977: declared CFormatter::normalizeDateValue() as protected

Conflicts:
	CHANGELOG
updated docs of CFormatter class
fixed spaces -> tabs
Removed @property declaration
Added more docs about second param.
Fixed docs
Merge pull request #2066 from Ragazzo/CComponent-attachBehavior-method-fix

Added more docs about second param for CComponent::attachBehavior()
Merge pull request #2065 from Ragazzo/CDbTestCase-property-fix

Removed @property declaration in CDbTestCase
doc fix
optimized by replacing a function reference with direct syntax
Merge pull request #2071 from and-ers/master

Optimized null check
[NL] Translation updated
Merge pull request #2074 from Blizzke/master

Dutch translation updated for the latest changes
[ci skip]
Fix query string problem #2078 with CListView and CGridView when enableHistory=true
Small changes in docs