#114 Javaagent support for Emma

[Dan Fabulich]

Right now, on-the-fly instrumentation doesn't always work, especially when the application makes creative use of classloaders (for example, web app servers).

Java 1.5 introduced the ability to provide a pure-Java "javaagent" which can use the java.lang.instrument API to instrument classes throughout the JVM, even replacing classes with other classes.

If Emma provided a javaagent, the javaagent mode would work much better than on-the-fly mode as it is currently implemented.