Add support for xdebug memory usage tracing (xdebug.trace_format = 1)

[jokkedk]

It would be great if webgrind could handle xdebug's new trace format which includes memory usage.

Se more on: http://derickrethans.nl/xdebug-and-tracing-memory-usage.html

[das-peter]

Maybe https://github.com/corretge/xdebug-trace-gui could be integrated.

[saada]

:+1: