added test suites for DataMapper.
Merge branch 'mapper' of github.com:asaokamei/wsCore into mapper
moved rendering-self to Template and tested it.
assing given parameter to itself.
removed/fixed PHPdocs.
started testing Template.
more test on assignments and filters.
added PHPDocs about what returned from go()... it's Dimplet.
added test on arrays and non-assigned value.
added test on external date filter.
added a method to get the Dimplet container.
added tests on using template files including self-template type.
created a Filter object to handle all filter objects.
inject and use the filter object.
now filters are object, not static.
use selected objects.
use filter notation, not calling filter directly.
removed unused parameter, $injectInfo.
added a test on block.