Fix installation paths and update README on building, bump version

The installation path for plugins was encoded wrong in the finit binary
if *not* unset, i.e., "prefix=".

Updated the README with information on all build related environment
variables.  Much of it is perhaps only needed for packagers and
distributions.

New version bump, v1.2 already.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

ChangeLog

@@ -0,0 +1,62 @@
+1.2 (20120927)
+	- Fix installation paths encoded in finit binary
+	- Update README with section on building and enviroment variables
+
+1.1 (20120927)
+	- Build fixes for ARM eabi/uClibc
+	- Rename signal.[ch]-->sig.[ch] to avoid name clash w/ system headers
+
+1.0 (20120926)
+	- New plugin based system for all odd extensions
+	- New service monitor that restarts services if they die
+	- New maintainer at GitHub http://github.com/troglobit/finit
+	- Add standard LICENSE and AUTHORS files
+	- New focus: embedded systems and small headless servers
+
+0.6 (20100614)
+	- don't start consolekit manually, dbus starts it (rtp)
+	- unmount all filesystems before rebooting
+	- disable USE_VAR_RUN_RESOLVCONF for Mandriva
+	- unset terminal type in Mandriva before running X
+	- remove extra sleep in finit-alt before calling services.sh (caio)
+
+0.5 (20080821)
+	- add option to start dbus and consolekit before the X server
+	- finit-alt listens to /dev/initctl to work with reboot(8) (smurfy)
+	- write runlevel to utmp, needed by Printerdrake (Pascal Terjan)
+	- fix ownership of /var/run/utmp (reported by Pascal Terjan)
+	- remove obsolete code to load AGP drivers
+	- conditional build of /etc/resolveconf/run support
+	- add support to /var/run/resolvconf in Mandriva (blino)
+
+O.4 (20080516)
+	- default username for finit-alt configurable in Makefile
+	- create loopback device node in finit-alt (for squashfs)
+	- add option to use built-in run-parts instead of /bin/run-parts
+	- ignore signal instead of setting to an empty handler (Metalshark)
+	- handle pam_console permissions in finit-alt for Mandriva
+	- add services.sh example and nash-hotplug patch for Mandriva
+	- mount /proc/bus/usb in Mandriva
+	- add runtime debug to finit-alt if finit_debug parameter is specified
+	- read configuration from /etc/finit.conf
+	- run getty with openvt on the virtual terminal
+
+0.3 (20080223)
+	- Change poweroff method to reboot(RB_POWER_OFF) (Metalshark)
+	- Remove duplicate unionctl() reimplementation error
+	- Fix string termination in path creation
+	- Mount /var/lock and /var/run as tmpfs
+
+0.2 (20080219)
+	- replace system("touch") with touch() in finit-mod (Metalshark)
+	- disable NO_HCTOSYS by default to match stock Eeepc kernel
+	- drop system("rm -f") to clean /tmp, its a fresh mounted tmpfs
+	- write ACPI sleep state to /sys/power/state instead of
+	  /proc/acpi/sleep (Metalshark)
+	- use direct calls to set loopback instead of system("ifconfig")
+	- replace system("cat") and system("dd") with C implementation
+	- moved finit-mod and finit-alt helpers to helpers.c
+	- replace system("echo;cat") to draw shutdown splash with C calls
+
+0.1 (20080214)
+	- initial release