Adding support for building without encryption

Modified build scripts to add a new target (jar-no-encryption-complete)
that avoids packaging anything referencing encryption, and excludes
bundling of the bouncycastle jars.
Merge pull request #592 from mamccr/master

Modify builds to create a distribution of jruby-complete.jar that doesn't include bouncy castle jars or references to them.  This is useful for companies that need to meet strict export restriction constraints.