Merge pull request #59 from jitlogic/fixes

Fixes, cleanups, refactorings, javadocs.
More refactorings, cleanups, javadocs etc.
Simplify package structure and cut dependencies.
Roll back some of previous changes (ot makes more mess than good).
More cleanups and javadocs.
Get rid of SpyRecord class.
Merge processors and collectors packages once again.
Get rid of spy.probes package.
Get rid of SpyConstProbe class and SpyProbe.processVal() method.
Get rid of spy.processors package.
Get rid of zorka.api package, move library objects back to their originating packages.
More fixes and cleanups.