Merge pull request #282 from makeclean/updated_install

added ability to add install prefix and thus installs libs & headers
Moved meshtal_funcs to be part of dagtally library.  Some small changes to build system and hardcoding to successfully build MCNP5
Merge pull request #284 from gonuke/rearrange_dirs

Moved meshtal_funcs to be part of dagtally library.  Some small changes ...
updated test settings
added test macro
Merge branch 'added_g4_testing' of https://github.com/makeclean/DAGMC into added_g4_testing