#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