Updated License name to full Apache 2
Fixes #388 and undoes previous commit where the wrong option was configured.
Make Persistit data dir relative: /tmp/graph -> db

Fixes #413
Refactoring bin/gremlin.sh config file handling

TitanFactory.open("path/to/titan.properties") now interprets
non-absolute backend directory paths relative to the directory
containing the the properties file.  Before this commit, it was
relative to the working directory of the JVM.
Delete redundant titan-site dependencies in dists

The titan-site dependency is declared in titan-dist; titan-dist's
children inherit the dependency need not declare it again
Restore TitanGraphConfiguration in new module

I erroneously deleted this in a649b7a3d40eae5fb7cbbe6b37988a, but it's
still needed for the Rexster quickstart distro