Remove protos, replace with custom byte serialization

[ilblackdragon]

Fixes #1166
Fixes #1083

[ilblackdragon]

Serialization benchmarks:

test deserialize_account ... bench:          49 ns/iter (+/- 9)
test deserialize_block   ... bench:   2,536,574 ns/iter (+/- 313,831)
test deserialize_tx      ... bench:       2,400 ns/iter (+/- 285)
test serialize_account   ... bench:         271 ns/iter (+/- 87)
test serialize_block     ... bench:     128,271 ns/iter (+/- 17,350)
test serialize_tx        ... bench:         591 ns/iter (+/- 302)

[evgenykuzyakov]

Also, run clippy on it. A lot of things would popup like .map(|a| a.into())

[maxzaver]

Moving borsh to https://github.com/nearprotocol/borsh

[ilblackdragon]

Latest bench with BORsh:

test deserialize_account ... bench:          37 ns/iter (+/- 3)
test deserialize_block   ... bench:   2,120,731 ns/iter (+/- 433,084)
test deserialize_tx      ... bench:       2,027 ns/iter (+/- 168)
test serialize_account   ... bench:           0 ns/iter (+/- 0)
test serialize_block     ... bench:     338,078 ns/iter (+/- 28,825)
test serialize_tx        ... bench:         228 ns/iter (+/- 24)