Use namespace with leading backslash is not recommended

See: http://www.php.net/manual/en/language.namespaces.importing.php
Rename dir Core to Base
Move testcase to FwlibTest namespace
Use PHPUnit to test project
Migrate class/datetime.php to Util\DatetimeUtil
Update ClassLoaderTest, no temp file needed anymore
Add test for Util\DatetimeUtil::cvtTimeFromSybase()
Minor change
Fix copyright style
New class Util\ArrayUtil and testcase
New class Config\Config
config: Migrate method limitServerId() from func/config.php
Config: Add check of test_helpers extension in testcase
New class Config\ConfigGlobal
Optimize config default example using static class
Base: New class AutoNewObj
Mark migrated class/func as @deprecated
Util: Migrate func/array.php to Util\ArrayUtil

- ArrayAdd()    --> increaseByKey()
- ArrayEval()   --> StringUtil::evalWithTag()
- ArrayInsert() --> insert()
- ArrayRead()   --> getIdx(), getEdx()
- ArraySort()   --> sortByLevel2()
Util: Migrate func/string.php to Util\StringUtil

- MatchWildcard() --> matchWildcard()
Util: Migrate func/array.php::FilterWildcard()

To: Util\ArrayUtil::filterByWildcard()