Merge pull request #63 from tsloughter/master

include relx header with include instead of include_lib
Merge pull request #65 from tsloughter/master

fix non-path includes to be include instead of include_lib
Merge pull request #66 from tsloughter/master

support list of overlay_vars files
Merge pull request #67 from tsloughter/master

add overlay_vars command line arg
remove rlx log and use ec_cmd_log instead
make sure the system is compiled before running dialyzer
Reuse generated erts directory in tar command
Use the start_clean boot file for remote console
Merge pull request #69 from ericbmerritt/remove_custom_logger

Remove custom logger
Ensure scripts are updated on upgrade for cold starts
Merge pull request #70 from evax/erts_include_fixes

Fixes for erts_include
Merge pull request #71 from evax/script_update_on_upgrade

Ensure scripts are updated on upgrade for cold starts
add optoin to use custom system_libs dir. This closes #64