Add excluded/included parameters to project configuration
Add main() and discover_project_config() methods to analyzer
Indexing uses information about project exclusion/inclusion
Report about unresolved modules only once
Reduce output from logging in console
More precise statistics collecting. Move statistics calculation in helper script.

For every downloaded project separate virtualenv is created in './env' directory.
If setup.py file exists in project directory it used to install project in setuptools'
'develop' mode, thus installing all its dependencies. Then greentype installed
in develop in virtual env as well and run on project as standalone process.
JSON reports collected during each analysis are used to calculate and display
statistic metrics as before.

github-project-fetcher.py and previously existed 'batch' mode of runner.py are now
combined in single script called experiments.py. Use commands 'fetch-projects' and
'collect-statistics' to distinguish  functionality  respectively.