Added first test for setting and getting the erlslim log path
Added test for default log path
Added test for resetting the log
Added test for writing stuff to log
Refactored the test, more readable when the expected is explicit
Added support for erlslim_log to set default path when Path is error.
This for the cases when init:get_args is not set
Refactored erlslim log so that branching on error is performed only at the point
where the actual value is needed.
Factored out log info from erlslim and erlslim_command.
erlslim_log is now the only interface to the logging