config/* is on .gitignore, so config/ax_jni_include_dir.m4 shan't be commited
Revert "config/* is on .gitignore, so config/ax_jni_include_dir.m4 shan't be commited"

This reverts commit 7879705ba9e23385a9552c79fd1307e8e9fc537c.
updated INSTALL and src/config.hpp.in from latest autogen(?)
added support for MacOSX and Oracle's Java
added darwin subfolder to catch jni_md.h automatically
Merge pull request #268 from davipt/master

Fix compilation for MacOSX and Oracle's JVM