mpt: simplify rangeProof handling & flatten mpt file structure

[gabrocheleau]

This addresses this comment and makes some misc minor improvemnts to the mpt package.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 11 lines in your changes missing coverage. Please review.

Project coverage is 28.06%. Comparing base (57267e2) to head (2fdcd0c).

Additional details and impacted files

Flag	Coverage Δ
block	67.57% <ø> (ø)
blockchain	83.50% <ø> (ø)
client	0.00% <0.00%> (ø)
common	89.85% <ø> (ø)
devp2p	0.00% <ø> (ø)
evm	65.21% <ø> (ø)
genesis	0.00% <ø> (ø)
mpt	54.13% <100.00%> (+2.00%)	⬆️
statemanager	63.81% <ø> (-0.04%)	⬇️
tx	76.70% <ø> (ø)
util	73.46% <ø> (ø)
vm	58.24% <ø> (ø)
wallet	0.00% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

[holgerd77]

For the record: I liked the non-flattened version a bit more, would not make this a blocker though.

What is important (necessary) though: have these files been moved by git ? (GitHub then normally shows the transition) Otherwise we would loose git history for these files. So if not, this would need an update.

[gabrocheleau]

For the record: I liked the non-flattened version a bit more, would not make this a blocker though.

What is important (necessary) though: have these files been moved by git ? (GitHub then normally shows the transition) Otherwise we would loose git history for these files. So if not, this would need an update.

I've decided to restore the initial folder structure, and only do the other updates (refactoring of the rangeProof etc.)

[holgerd77]

Client tests not going through

[gabrocheleau]

Client tests not going through

fixed by re-running