Added example bpFlushWriter (incomplete).

Implementing profiling.log as default

To do:
Memory buffer reallocation strategy

Fixed noexcept function throwing exception

BP file output now compatible with bpdump

Refactor

To do: 
Debug hello_datamanWriter non-MPI version

* Added examples for variables

* fix more example code

* make Open explicit in ADIOS1 toolkit. Fix handling open mode

* fix OpenModeToString() to serve adios 1 API's needs as well

* fix basic examples after code refactoring

* fix nompi build for basic examples

* fix nompi build

* fix one more example for nompi build

* Added examples for variables

* fix more example code

* make Open explicit in ADIOS1 toolkit. Fix handling open mode

* fix OpenModeToString() to serve adios 1 API's needs as well

* fix basic examples after code refactoring

* fix nompi build for basic examples

* fix nompi build

* Added examples for variables

* fix more example code

* make Open explicit in ADIOS1 toolkit. Fix handling open mode

* fix OpenModeToString() to serve adios 1 API's needs as well

* fix basic examples after code refactoring

* fix nompi build for basic examples

and clang-format issues

Merge fixes from pnorbert

* Added examples for variables

* fix more example code

* make Open explicit in ADIOS1 toolkit. Fix handling open mode

* fix OpenModeToString() to serve adios 1 API's needs as well

* fix basic examples after code refactoring

* fix more example code

* make Open explicit in ADIOS1 toolkit. Fix handling open mode

* fix OpenModeToString() to serve adios 1 API's needs as well

bool flag checks are implicit
Removed single letter enums in ADIOSTypes.h
All enums are enum class in ADIOSTypes.h using CamelCase
ADIOS uses delegating constructor
Using return type of emplace for IO (in ADIOS) and Variable (in IO)
Removed all base class include from inl template file

* fix more example code

* make Open explicit in ADIOS1 toolkit. Fix handling open mode

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