Move the specializations for the ADIOS class members to thier own file

Fix -DHAVE_FEATURENAME macros to actually work

Added a contributors guide

Fixed a bug in DataManWriter which uses a wrong engine name

Added upstream remote in setup script

Reinstate the use of reinterpret_cast

Verified by @JasonRuonanWang 

Move from indent width from 2 -> 4

Disable clang-format hooks.  It's more annoying than useful.

Fix gcc485 segfault

Using {} syntax for direct initialization of reference types in constructor
member initialization lists is broken on some compilers, even though it's valid
C++11 code.  Use () to ensure correctness.

Add examples as tests

Fix OpenMPi C++ binding issue for the whole project

Fix clang tidy issues round2

Fix clang tidy errors

Testing pull request with additions to .gitignore

The check is to use int64_t instead of long long.  At the moment it creates
a lot of noise.  Adjusting the code is a larger undertaking so I'm turning it
off for now.  Once the code is fixed for it then we'll turn it back on.