Initial source dump

- Not gonna be a happy year

Signed-off-by: Dustin Ngo (MacBook) <dustin.ngo@gmail.com>
Update 'ramp_index'

- Ramp index now forward fills NaNs
- Should set fill method as a parameter

Signed-off-by: Dustin Ngo (MacBook) <dustin.ngo@gmail.com>