Allow test clients to produce blocks without needing peers. Generate a test script to import the keys for the delegates for regression tests.
Fix crash at node shutdown if client is operated with starting network. Simplify one_client_test and two_client_test so that they shouldn't break frequently with changes to the cli. Modify regression_tests to handle tests with multiple input logs as input scripts, also fixup working directory in run_regression_test after changes made to boost test launching of each test.
Added new rpc method "enable_output" to enable/disable output from the cli (mainly intended for use when performing regression tests that run test harness scripts so that the test harness scripts don't need to contain expected output for the test harness commands). Modified the batch files that launch the test clients to accept additional command-line arguments from the launcher. Added script to import delegate keys.
Add info about using test client launch scripts to regresssion testing docs.