Rework directory checks/setups at launch#318

Merged

yeastplume merged 3 commits intomimblewimble:masterfrom yeastplume:setup_fixes

Jan 31, 2020

+101-26

Commits on Jan 29, 2020

rework setup code to ensure --top_level_dir flag works and all files are only output into the desired directory
yeastplume
committed
check for existence of wallet configuration file in target directory before asking recovery phrase and password
yeastplume
committed
test fixes and add test_mode flag to parse_init_args
yeastplume
committed