Fix global_edge_presence
Add global_edge_presence to db data

Everything loops more cleanly for DRY, but still need to figure out a better
way to do this.
Move db init to samc.pyx
Move redis data prep to utils.py
Factor out metropolis hastings from lori.py
Move experiments to /test
Updates .gitignore
More imports in test_class
Add symlinks to build .so's
Add symlink to libdai.so
Cleanup of path in test_net.py
Rename experiment files in tests