Bug-fixing on tabular slicing algorithms and improvements for benchmarks.

- Tabular algorithm: only traverse intraprocedural edges by default.
- Improved subsumption checks in tabular algorithm.
- Corrected actual-out detection.
- Added assertions to check for incorrect interprocedural edges.
- Control-flow is incorrect in anonymous routines: it produces interprocedural control dependence.
- Parametrized erlang server connection settings.
- Added new comparisons for benchmarks.
- New script to run benchmarks and analyze results with SQLite.