changed directory structure for glhpmc
moved into glhpmc namespace
moved some public API c-funcs as member funcs
moved buildIsoSurface to memberfunc
half of the samples use the new field class
added docs
ported transform_feedback to new api
removed factory from constants
removed factory from isosurface
moved binary flag to field
fixed particles sample
fixed splatting sample
Merge pull request #12 from hetcomp/cleanup_glhpmc

Cleanup glhpmc