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.
Fix tests for py27
Fix open mock in tests
More fixes for tests
Omit pypy modules from tests.
Add pypy3 as check in travis
Fix tests for pypy3
Hardcode the name of the plugin in received for log plugin.
Change README badgets
Add License as README badge
Set style to flat in badges
Set license color to blue
Revert "Set license color to blue"

This reverts commit aea693b20e0c6227402708284bcb570cfedcb5a6.
Bump version