Create StoreSeqAction for argument lists
Replace concurrency and query arguments with single list argument
Cleanup list argument, allow sequences inside of other lists
Indent stats.json

see #1079
fix defaults
Print config options better
Update benchmark.cfg.example with new flag lists
Merge branch 'master' into listargs-1123

Conflicts:
	toolset/benchmark/framework_test.py
Merge pull request #1126 from hamiltont/listargs-1123

Toolset: Allow arbitrary argument sequences