pipicpowerd.c add installation script

In Rasbian Wheezy compile the code in src/ and make manual pages in
doc/man. Then run 'sudo ./install' and all the programs and manual
pages are copied to correct places. In addition daemon init files,
log rotation files are set. The i2c module configuration is also
set for the files /etc/modules and /etc/modprobe.d/raspi-blacklist.