suport nested custom headers (i.e x-death)
see issue #45
remove cargo cult TSRMLS macro, I have no idea what it does.
switch back to tab indenting
only set value to null on empty or unsupported values
support timestamps in nested headers
do not allocate envelope header zval a second time
fix memleak in header parsing
add tests for parsing nested custom headers
add new tests to package2.xml
disable publish timeout test for now
fix another memleak warning in debug mode
recursively free header entries
remove problematic test amqpexchange_publish_timeout from package desc.
Merge pull request #48 from bkw/parseAmqpTables

suport nested custom headers (i.e. x-death)