Misc new functionality
Misc new functionality

Added:
- more clearly dividing/grouping the various funcs and methods with
comments
- array comparison funcs
- array retrieval funcs
- array iteration
- getitem support for boolean and numeric indexing
- boolean comparisons for arrays and single numbers
- math operators for arrays and single numbers

Rewrote:
- array math funcs

karimbahgat/tinynumpy