Added support for deprecating items, and maybe support for python 2.7

- Changed `test_data.js` to `test_data.json`
- Added `deprecated` decorator
- Added `deprecation` function
- Readded old functions, and marked them as deprecated
- Changed parameters back to being type-in-specific (support for python
2.x)
- Deprecated `info_log` and `debug` init paramters

.gitignore

@@ -23,4 +23,5 @@ develop-eggs
 docs/_build/
 
 # Data for tests
+test_data.json
 tests.data