Fix initial commit to meet the tests. Also largely resolve #849.

cli/castextcompiler.php

stack/cas/ast.container.class.php

stack/cas/castext2/blocks/foreach.block.php

stack/cas/castext2/blocks/if.block.php

stack/cas/castext2/blocks/raw.block.php

stack/cas/parsingrules/601_castext.filter.php

tests/ast_container_test.php

tests/castext2_test.php