Modify JunOS output so that it can be natively loaded into the router with "load replace"
Modified replace output to be triggered by -junos_replace command line switch
Fixed INSTALL
Merge branch 'junos_replace' of https://github.com/darylc/irrtoolset into darylc-junos_replace
reformatted if statement to make code flow more obvious

removed some trailing spaces in @darylc's patch
Merge branch 'darylc-junos_replace'