HPCC-10103 ws_wql Initial check-in
- creates esp/services/ws_sql
- adds dependancy on ANTLR and ANTLRc
- provides FindANTLR and BuildANTLR3c
- packages libantlr3c.so
- makes ws_workunits functionality available to outside proj

Signed-off-by: Rodrigo Pastrana <Rodrigo.Pastrana@lexisnexis.com>