Enhance-Add OS-CPU bit checking (#17)

encourage users to submit the output of lsb_release as an issue when
that test fails, this should allow contributors not in irc at the time
of the problem to see the information
Add CPU and OS bit checking which can be disabled with --no-cpu-check

install.sh

@@ -1,4 +1,9 @@
 #!/bin/sh
+# Exit codes
+#	1	general error
+#	2	unsupported OS
+#	3	unsupported CPU/OS bits
+
 # check to confirm running as root.
 if [ "$(id -u)" -ne "0" ]; then
 	echo "$(basename "$0") must be run as root";
@@ -9,7 +14,6 @@ echo
 #Os/Distro Check
 os_check=$(lsb_release -is)
 check_major_release=$(lsb_release -rs | cut -d. -f1)
-lsb_release -c | grep -i jessie > /dev/null
 
 os_unsupported () {
 	echo " Your Operating System appears to be: "