Memoization

1. **[NEW]** Custom cache keys are now supported!

1. Add supports for kwarg-order-independent cache key

1. **[NEW]** python-memoization is now extensible! Add any caching algorithms you like at ease.
2. Major bug fixes
3. Better examples
4. Better test cases
5. Better code structure, readability and documentation
6. [REMOVED] Support for Python 2 dropped

1. __[NEW]__ Support for thread safety
2. __[NEW]__ LRU, LFU and FIFO as caching algorithm
3. __[NEW]__ Cache statistics
4. More friendly APIs
5. Major bug fixes
6. Better documentation
7. Use strict typing when caching items
8. [REMOVED] Drop support for partial cache clearing (pending implementation in v0.2.x)
9. [REMOVED] Drop support for Python 3.2 and 3.3

Major bug fixes

Major bug fixes, supporting python 2.6, 2.7, 3.2, 3.3, 3.4, 3.5, 3.6, and 3.7