Some necessary updates for later gcc

Found only way to use RAII for CURAND

Add TODO, consider CUDA example

Still a draft, device code vs. global

Uniform distribution generator

CUDA error handling and formatted notes on CURAND

Added radioactive decay of 2 nuclei example, added simulation interface

Amend random number generators to use unique ptr to a seed; notes on 2 radioactive decays

Reverted back to before, test with draft next

Merge branch 'master' of github.com:ernestyalumni/CompPhys

Still need to fix rng seed, radioactive decay

Update LICENSE

Add Particles in a box; notes on time evolution of a system of state variables

Working crude monte carlo

Fixed up interface for Rings; added random number generators for Monte Carlo