Require sexpdata>=0.0.2

fixes #4
Make examples/epcs runnable via make
Add run-testable-samples make target for full-test
Fix run-testable-samples with ENV=py26
Add clean-elc make target
Merge branch 'run-testable-samples'

Run more examples in full-test
Add new log_traceback option
Add command line debugging options to epc.server.main
Set log_traceback=True in examples
Add TestEPCServerRequestHandling.test_log_traceback
Fix failure with Python 2.6 (use unittest2)
Refactor test_server.py
Merge branch 'log-traceback'

Add `log_traceback` option to print traceback using
`logger.error(..., exc_info=...)`.
Bump to 0.0.4.dev1