Additions and changes:
- add 3 new extensions: htscanner, PDFlib, Rar
- update APCu reference to 4.0.2
- update pthreads reference to 0.0.45
- introduces an experimental DYN lazy loader references ( NOT YET OPERATIONAL, missing rules implementations )
- drop support of PHP4 reference
- drop support of PHP 5.2

Bug fixes:
- none
