SQLCMD Move SQLCommand changes from notest-voltcli.
Merge branch 'master' of github.com:VoltDB/voltdb into notest-sqlcmd
SQLCMD Add persistent history.
SQLCMD Make history search case-insensitive.
SQLCMD Minor refactoring.
Merge branch 'master' of github.com:VoltDB/voltdb into notest-sqlcmd
SQLCMD Fix RECALL not displaying recalled command.
SQLCMD Restored old Ctrl-C behavior.
SQLCMD Remove commented out code.
Merge pull request #299 from VoltDB/notest-sqlcmd

ENG-4094 SQLCommand enhancements