Merge pull request #110 from pjona/master

Fix xajax for PHP 5.4
xajax: some fixes ported from xajax git
xajax: some fixes ported from xajax git (part 2)
more conformance with php 5.4
convert init_pdf to get $pdf as reference parameter
init_pdf: proper way returing by reference
init_pdf: fix returing by reference
prototype adjusted to LMS::GetCustomer()
PHP engine makes performance optimizations on its own
killed php warnings
Ignore Vim temporary files