* Update bls_signature_scheme.md with BLS12-381-reversed
* Update DIP3/DIP4 to use BLS operator keys
* Update DIP5 to use BLS keys for user keys
Also add the "Size" column to all serialization specs to align with other DIPs.
* Update BLS primitives serialization size in DIP6/7
* DIP3 - Correct PubKeyOperator type
* DIP4 - Correct PubKeyOperator type
* Remove trailing e from integere
I propose to change DIP3 in a way that splits funds handling and DMN registration.
Pros:
1. no need to move collaterals;
2. no need to update HW wallet firmware to support.
Cons:
1. the logic is going to be slightly more complicated;
2. the process of MN registration is going to be split between using HW wallet and Core;
3. `ProRegTx` payload size is going to be slightly higher (+32 bytes).
These fields are used in the pre-publish state, but are redundant for published
DIPs which have already been assigned a DIP number. As an example, DIP1 does
not have this field.
