Initialization of picker, the greatly stealer of windows titles.
Make exceptions.

Now picker inform us about bad arguments.
Delete tests.

Tests aren't need for this small application.
Small changes to the picker.py
Edit information in setup.py
Add .gitignore file.

I need create it for ignore virtualenv of this project.
Add README file.
Merge branch 'master' of https://github.com/Nalad/picker