Separate autogenerated php into specific folder and code tidy.

stack/cas/castext.class.php

stack/cas/castext/autogen/castextparser.class.php

stack/cas/castext/autogen/notes.txt

stack/cas/castext/block.factory.php

stack/cas/castext/block.interface.php

stack/cas/castext/castext.peg.inc

stack/cas/castext/comment.block.php

stack/cas/castext/debug.block.php

stack/cas/castext/define.block.php

stack/cas/castext/escape.block.php

stack/cas/castext/foreach.block.php

stack/cas/castext/if.block.php

stack/cas/castext/jsxgraph.block.php

stack/cas/castext/latex.block.php

stack/cas/castext/raw.block.php

tests/parser_test.php

thirdpartylibs.xml