Installation instructions update

[amcelroy]

Notes:

1.) Compile java code to .class files:

• unzip master.zip

• cd jpigpio-master

• cd jpigpio

• mkdir bin

• javac $(find . -name "*.java") -d bin

2.) Change JPigpio/Makefile install dir: i.e. /home/pi
3.) Change JPigpioC/Makefile to match above: i.e. /home/pi
4.) Make sure JAVA_HOME is set (mine wasn't). Added it to makefile.
5.) Run make from jpigpio-master