Some cleanups.
Refactor class/method matchers.
Filters for constructors, getters/setters and common methods.
Fixes (from running tracer on Apache Tomcat).
Partial implementation of zorka-viewer GUI.
Add wall clock time to trace records.
Add wall clock time to trace records, get rid of tstart/tstop attributes, use single variable for execution time.
Rudimentary viewer implementation (barely but useful).
Lump spy and tracer back together (these are really one).
Fix nasty bug breaking exception handling in instrumented code.
Merge pull request #70 from jitlogic/rel08a

Make tracer working with tomcat, add simplistic trace viewer.