Big refactor

- Move importer class to util (change behaviour)
- Move timer to util
- Refactor tests
Simplify the install code.
Remove invalid config
Some fixes to pass tests in python2.7
Remove unused conditions
Pass tests when installing a package
Big refactor

- Change tests. Now are more modular
- Move some core modules to util
- Use __init__ for generic classes
- Create plugins/ dir for included debug plugins
- Delete adtitional test stuff.