pushed batfish project code into its own directory, created symlinks to external dependencies
added missing files to clean deletion list
added antlr 4.2 and partially ported cisco grammar
Restored LB code, still waiting for libraries
fixed incompatiblity with dual antlr libs in classpath
Fixed null pointer due to commented LB code
now get LB_HOME directory from env for lbcompile
added batfish functions suitable for general use