Now builds with SBT. I'm tired of fighting Gradle. Removed all "test"…

… classes that aren't JUnit tests. Fixed Javadoc problems. Removed copyrights from individual source files.

Switch to Gradle. Merge in patch for NPEs.

Version 3.1.1

Fixed issue 6: POM file doesn't have dependencies.

Added copydoc target

Updated to produce javadocs

Changed license

Release of 2.5.1

Update ASM version.

Release 2.4.3