Close #7 - Add FindADIOS.cmake Script from PIConGPU

This commit adds a slightly modified and relicensed (BSD) version of
the FindADIOS.cmake module in PIConGPU (http://picongpu.hzdr.de)

The module checks for all dependencies provided by `adios_config`,
please check the module help for further information.

Best greetings from Dresden Germany,
Axel and Felix