redmine feature # 1708

redmine feature # 1708

creation of the "installscript" bash script
the install can be done in one pass
root passwd is ask when necessary (at most once)
all options are given from command line (not interactive)
detect itself linux distrib, number of processor, user login/group
add packages list for Mandriva distrib.
add the RelWithDebug compilation option.
example in READMe.txt