Remove all unused build references.

Remove references to empty plugin.xml's, and delete them.
Updating PyDev version to match release version.
Providing a way to listen to lifecycle changes in PyUnit runs.
Fix for both #PyDev-82 and #PyDev-109.

Run the pylint executable script instead of lint.py.
Run pylint with project location as working directory.
Remove empty plugin.properties files.

There remain some empty plugin.properties files that were not removed
last commit. Remove them now.
Make fix for #PyDev-109 backward compatible.

Allow both lint.py or pylint executable to be specified.
Merge pull request #9 from akurtakov/development

Remove all retroweaver stuff.
Merge pull request #11 from AndrewFerr/aferrazz_dev

More cleanup
Merge branch 'ticket109' of https://github.com/Cito/Pydev into Cito-ticket109