Merge pull request #83 from inolen/master

assorted changes
readd the printfs about unhandled types
added unit tests for newShort and newLong, updated readme for newLong
added unit test for instanceOf and updated readme
v0.2.8
comment out printing unhandled type. See https://github.com/nearinfinity/node-java/commit/9308985b676353452bb81b481d206abfa8496a6c#commitcomment-4570896
 - added env->ExceptionCheck checks