Add reference to java_send in "Ruby to Java" section.
Added notes on java_send and java_method based on Headius' Sep 29, 2009 mailing list post.
Added note about preferring java_import over plain import.
Add Logan Barnett
Add self
update available version
Mathn module should be fully implemented now
configure is not necessary for 1.3.x
Build is reasonable only for a sane OS.
updated for JRuby 1.4.0
minor formatting changes
update version info in local context type section
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