* adios: conform to pep8
* adios: added versions 1.11.0 and 1.12.0
* adios: added variant no_mpi to explicitly disable mpi support
* adios: add new variant mxml
adios v1.12.0 onwards contains an xml library built within.
To build with an external mxml, a new variant must be used
* adios: new variant for sz transform
* adios: flexpath and dataspaces staging variants
Two new variants for staging: flexpath and dataspaces.
New variant 'staging' that will enable both
* adios: dependency on libtool:2.4.2 since adios does not build with newer libtool 2.4.6
* adios: better description for variant no-mpi
* adios: new variant for netcdf
as requested by @mamelara from LBL
* adios: renamed variant 'no_mpi' to 'serial'
* adios: removed variant mxml
* adios: corrected implementation of the mpi dependency, along with its relation with the 'serial' variant
Added conflicts between 'serial' and other variants
* adios: added 'else' clause when variants are not added
* adios: replaced variant 'serial' with 'mpi'
* adios: Added configure option to explicitly disable variants that are not enabled.
* adios: setting default zfp to true
* adios: fixed flake8 errors
* adios: removed some old comments
* adios: setting default sz to False.
It is recommended to set default to False when dependency is on develop (sz@develop).
* adios: removing dependency on develop for sz and setting default sz to true
* adios: updated url to latest release.
Just keeping it clean