Added XML config file to helloBPWriter example

re-wrote StreamMan to allow multiple streaming managers to work simultaneously for parallel streaming

added heatTransfer with adios/hdf5 

and causing clang error

added direct callback mode to dataman receiver to bypass cache

Fixed multistep example for no-mpi by adding extra ifdef's

Refactoring examples area

fixed a few DataMan problems caused by recent merges

Read joined arrays using ADIOS1. Depends on ADIOS1 commit d1708c3e Ma…

Fixed a compiling problem for Mac which is caused by conflicts between size_t and uint64_t

Fix hello examples

Fix hello examples with new DefineVariable() syntax, for BP, timeBP and ADIOS1. Missing HDF5 and DataMan

Variables3

Move jsonhpp to thirdparty

This doesn't work across the board for json.hpp but it works for the
the way we use it.

* upstream-NLohmannJson:
  NLohmannJson 2017-02-25 (9ff0cc0f)

JSON For Modern C++ Upstream authored 8 years ago and Atkins, Charles Vernon committed 7 years ago

Code extracted from:

    https://github.com/nlohmann/json.git

at commit 9ff0cc0f0212cb1e85b83ce5d2907ba9531b6cae (v2.1.1).