Merge pull request #15 from serathius/refactor

Refactor.
Test logger_level_to_error.
Merge pull request #16 from serathius/tests

Test logger_level_to_error.
Lighten wsgi and test.
Refactor.
Merge pull request #17 from serathius/tests

Lighten Wsgi
Code clean.
Release 1.0.
Generate own ID.
Refactor.
Refactor.
Refactor.
Refactor.