Commons # collection container alias clear -> clearAll

git-svn-id: http://source/svn/php_commons/branches/php_commons-4-github@2437 e588dd84-e1f6-4f18-b586-b92c208bf0ea
Merge branch 'master' of ../php_commons-4-github
Commons # collection container get default value

git-svn-id: http://source/svn/php_commons/branches/php_commons-4-github@2438 e588dd84-e1f6-4f18-b586-b92c208bf0ea
Merge branch 'master' of ../php_commons-4-github
Commons # sql improvement, support for nested sql transactions

git-svn-id: http://source/svn/php_commons/branches/php_commons-4-github@2439 e588dd84-e1f6-4f18-b586-b92c208bf0ea
Merge branch 'master' of ../php_commons-4-github