Back to bp1 name.bp.dir/name.bp.rank format

This fixes #117

Enable config xml file

HDF5Common.cpp moved to a new location and this one is no longer used

CMake: Use ADIOS2_ prefix for options instead of ADIOS_

Added Date and Time to profiling.log

Verified MPI and sequencial version

Initial implementation of XML running with helloBPWriter example
Corrected bug in ADIOS.cpp when detecting IO in ConfigFile

Correcting a warning on Mac

unsigned int checking if < 0
Adding intermediate int verbosity for string conversion stoi

CMake: Allow auto-detection of default options

Fixing inclusion problem in BP1Base.tcc

Initial implementation of buffer resizing and flush for independent IO

Fixes issue #130

m_Name must a string object not a const reference. 

Python Bindings and their required internal code changes

Added example bpFlushWriter (incomplete).

Implementing profiling.log as default

To do:
Memory buffer reallocation strategy

Fixed noexcept function throwing exception

Removed IO Open that takes a new communicator (didn't work)

* Add initial python support to CMake build

* pybind11 2017-04-07 (1df91d36)

Code extracted from:

    https://github.com/pybind/pybind11.git

at commit 1df91d36cfa997c8987889234304ea5e37cc3e68 (v2.1.1).

* Add initial python support to CMake build

* pybind11 2017-04-07 (1df91d36)

Code extracted from:

    https://github.com/pybind/pybind11.git

at commit 1df91d36cfa997c8987889234304ea5e37cc3e68 (v2.1.1).

* Build python bindings with cmake

* Adjust for adios2py -> adios2 module name

Applied autopep8 from python-pep8 for flake8 formatting in py

Issues:
Linking with Python 3.5 not working as-is with PyBind11
Passing a new communicator in IO Open fails (mpi4py?)

To do:
Add more test cases from other engines

BP file output now compatible with bpdump