memory.cpp: Initialize m_nextWarning
Export tpie_print_memory_complaint (for debugging)
Remember to include cassert in tpie_assert
Add timing support to unittest
Remove deprecated interfaces in pipelining

init_segment has been deprecated since December 2012 (d235f4f)

node::go(progress_indicator_base &) has been deprecated
since September 2012 (33d119d)

node::add_pull_destination has been deprecated since June 2013 (d6f9caa)
Move merge.h into deadcode
test/unit/CMakeLists.txt: Break lines with more than 6 unit tests
Add tpie/pipelining/parallel/flush.h
In parallel, call flush() on the worker if maintain_order is specified

We check using SFINAE whether the first node in the pipeline has a
flush() method.

If maintain_order is specified, we call flush() on the worker pipeline
before sending the results back to the main thread.
We throw an exception if maintain_order is specified and the
first node in the worker pipeline does not implement flush().
ut-pipelining: Implement multiplicative_inverter_type::flush
Document the need to implement flush()
Add ut-pipelining parallel_ordered_2 test