fixing problem with invalid variable names in templates - #152
added some more tests for ifconfig
added check if template result is empty. if so - die() - #152
fixinig 'unititialized value' output of inspect() function. returning now 'no value'. - #152
fixed --use usage with a = sign
updated documentation for headless mode
fixed exit_status for some situations where it produces wrong values.
updated changelog and buildfiles
updated doc