Simplified graphd/giraph build
Removed direct reference to the Graph class from factory.

Now we can freely add more drivers and selectively deploy them without
changing the code.
Renamed to README.md and Updated link to paper
sqlitegraph
Made build more smooth, playing nice with Linux ps
graphd start -f foreground option
UI marker-end fix for Safari 6

Safari 6 seems to have fixed base URL handling, and had to assign the
marker-end SVG style dynamically with the exact location
Polished build and source tree