Fix heatTransfer codes for refactored classes

Conflicts:
	examples/experimental/multistep/reader_allsteps.cpp
	examples/experimental/multistep/reader_stepping.cpp
	examples/experimental/multistep/writer_multistep.cpp
	examples/hello/README.md
	examples/hello/bpWriter/helloBPWriter.cpp
	examples/hello/hdf5Writer/helloHDF5Writer.cpp
	source/adios2/engine/hdf5/HDF5Common.cpp
	source/adios2/engine/hdf5/HDF5WriterP.cpp
	source/adios2/engine/hdf5/HDF5WriterP.h

1 Now IO (replaced Method) and is the factory for Variables and Engines
2 Reduced core components to user-public objects only
3 Moved and reorganized all helper functions to helper directory
4 Engines are now lightweight (except for ADIOS1Reader WIP) using MACRO
5 HF5Common and ADIOS1Common (except for Readers WIP) are now part of the toolkit so they can be reused by Engines
6 TransportMan is a new layer for transport management (file is default)
7 DataMan will be implemented under toolkit/transportman/dataman
8 Template separation (tcc and inl) applied all over the code
9 Improved Doxygen documentation

Runtime Issues:
DataMan library compilation (cacheman)
ADIOS1 Warning
TestADIOSInterfaceWrite catches exceptions

GoogleTest: Update to upstream

Hdf5

GoogleTest: Update upstream module

Require adios 1.12.0 when building with -DADIOS_USE_ADIOS1=ON

CMake: fix some compatibility issues with HDF5 vars

Add gtests individually

ADIOS1: Enable compatibility with 1.10.0 adios_declare_group signature

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